The latest celebrity-approved accessory is a silicon bracelet called the Lokai.

Like the iconic yellow Livestrong bands of years past, this one promises to distribute a portion of its profits to charity — 10%, in this case. Like the Livestrong, you can wear it 24/7 without worrying about it tarnishing or falling off.

But unlike the cheap Livestrong bracelets — which cost $10 for a 10-pack — the Lokai is $18 a pop. And instead of sending money only to cancer research, Lokai donates its proceeds to a selection of different charities.

"It's a very millennial take on how to change the world and how to give back," Lokai's 25-year-old founder, Steven Izen, told Business Insider.

Though Lokai has declined to share how many bracelets it has sold, the company has raised over $4 million for charities since the brand's launch in 2013, thanks in part to some serious celebrity support and a strong social-media following.

SEE ALSO: Meet the 'Man Repeller,' the 27-year-old who turned her fashion hobby into a serious business

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The idea for Lokai came from a bittersweet moment in Izen's life: While enjoying a vacation with his family, he received news that his grandfather had Alzheimer's.

His desire to find balance in the midst of the "highest highs" and "lowest lows" turned into the distinctive Lokai design.

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Each bracelet has one white bead encasing water from Mount Everest and one black bead filled with mud from the Dead Sea — the highest and lowest points on earth. Izen even found a team of Sherpas who could get him the Everest water.

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The top tier of wealth in the world is a veritable boys' club, with only four women breaking the top 50. But that doesn't mean there aren't plenty of women who have earned huge fortunes for themselves as well.

With data from Wealth-X, a company that conducts research on the super wealthy, Business Insider has taken a look at the richest self-made women in the world. These women have built companies, pioneered new technologies, and made huge advances in their respective fields. They're worth a combined $53.1 billion — larger than the combined gross domestic product of Honduras, Iceland, and Cambodia.

The list includes household names like media mogul Oprah Winfrey as well as influential but lesser-known personalities such as Gap founder Doris Fisher.

Keep reading to see how these 15 women made their fortunes.

SEE ALSO: The 25 richest self-made billionaires

DON'T MISS: The 20 youngest self-made billionaires in the world

14. TIE: Lynda Resnick

Net worth: $2.4 billion

Country: US

Age: 72

Industry: Agriculture

Source of wealth: The Wonderful Company

At 19, Resnick, a former child actress and daughter of a Hollywood movie producer, dropped out of college to found an advertising company called Lynda Limited. In 1973, Resnick married her second husband, Stewart Resnick, who was managing a private security business, and the two combined their assets.

The Resnicks made a succession of company acquisitions and sales throughout the 1970s and 1980s. Their first forays into agriculture included the purchase of a 12,000-acre pistachio and almond farm in California for $30 million.

The company today generates $4 billion in sales from best-selling brands like Wonderful pistachios, Pom Wonderful pomegranate juice, Wonderful Halos (formerly Cuties California clementines), Fiji Water, Justin Vineyards, and the Teleflora flower-delivery service. Last summer, Roll Global was renamed The Wonderful Company, where Resnick serves as vice chairman.

The Resnicks are no strangers to controversy. The Federal Trade Commission successfully sued them for deceptively marketing and inflating the health benefits of their pomegranate juice (the Resnicks are appealing to the Supreme Court). They have also taken heat for their access to and use of water during California's drought.  

14. TIE: Marian Ilitch

Net worth: $2.4 billion

Country: US

Age: 83

Industry: Diversified

Source of wealth: Little Caesars

Ilitch has been in the food industrysince she was a little girl. Starting at age 10, she worked at her father's restaurant in Dearborn, Michigan, where she filled the salt and pepper shakers. In 1959, Ilitch and her husband, Mike, opened the first Little Caesars pizza store, the moniker stemming from Marian's nickname for Mike. In 1962, the couple sold their first franchise for $5,000. Today Little Caesars has more than 4,000 fast-serve pizza restaurants.

Though the Ilitches command one of the largest takeout pizza chains in the US, their overall empire is even larger. Ilitch Holdings consists of 10 companies that specialize in food, sports, and entertainment, including the MLB's Detroit Tigers, the NHL's Detroit Red Wings, and the MotorCity Casino in Detroit. They bought the Red Wings for $8 million in 1982; the franchise is worth $600 million today.

The Ilitches will both be inducted into the International Franchise Association's Hall of Fame this year.

11. TIE: Johnelle Hunt

Net worth: $2.5 billion

Country: US

Age: 84

Industry: Logistics

Source of wealth: J.B. Hunt Transport Services

When the J.B. Hunt Company opened in 1962, founded by Hunt's husband, Johnnie, who died in 2006, she started out as a part-time employee, helping get the business off the ground. Hunt quickly became an integral part of the company, moving up to full-time employee and then cofounding the logistics company J.B. Hunt Transport alongside her husband in 1969 with only five tractors and seven trailers.

Thanks to Hunt's entrepreneurial vision, the transportation company grew, eventually integrating J.B. Hunt proper into it. The company went public in 1983, and by 2004 it commanded more than 11,000 trucks and more than 16,000 employees. Today the company is worth $9.5 billion.

In 2001, Hunt cofounded Hunt Ventures, an office and retail development company, where she still serves as chairman. The company tackles large-scale real-estate projects, such as Pinnacle Hills, a 700-acre development that will feature more than 2.5 million square feet of restaurants, retail space, and offices.

The late architect Zaha Hadid, known as "The Queen of Curves" for the modern curving designs of her buildings, died Thursday at the age of 65.

Her legendary career led her to become the first woman to win the Pritzker Architecture Prize (the Nobel Prize of her field) in 2004. She also received numerous other awards and honors, including being named a Dame Commander of the Order of the British Empire (DME) in 2012 and earning the Royal Institute of British Architects Gold Medal in 2015 — the first ever given to a woman.

The Iraqi-born British architect died in a Miami hospital after suffering a heart attack, a representative for Zaha Hadid Architects confirmed with Business Insider. She had been admitted to the hospital after contracting bronchitis earlier this week.

Hadid designed everything from a metro station in Saudi Arabia to the aquatics center for the 2012 London Olympics to a city center in downtown Belgrade — all in her signature flowing style.

One of her newest buildings was just completed in New York City — an 11-story condominium made of steel and glass that incorporates a unique chevron pattern.

Click through to see how her style has evolved over time, and remember the artist through the body of work she has left behind all over the world.

SEE ALSO: 27 of the coolest new buildings on the planet

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Completed in 2003, the Rosenthal Center for Contemporary Art in Cincinnati was Hadid's first project in the US. It was a huge critical success.

Source: The New York Times

After the success of the Rosenthal Center, Hadid was hired for several other projects. The BMW Central Building in Leipzig, Germany was among the first. It was completed in May 2005.

Source: The New York Times

And she designed the Phaeno Science Center in Wolfsburg, Germany, which was also completed in 2005. The New York Times called it "the kind of building that utterly transforms our vision of the future."

Source: The New York Times

Hundreds of thousands of high school students throughout the world will learn Thursday at 5 p.m. if they were accepted or rejected into the Ivy League.

This year, every school (that has released data so far) reported receiving historic numbers of applications — meaning this is the largest applicant pool for the Ivy League to date. 

Harvard University, with 39,040 applicants, received the most applications of all the Ivies, beating last year's 37,305.

Good luck to all of the aspiring Ivy Leaguers out there.

Here's how many students applied to each Ivy League school:

• Brown University— 32,280 applicants
• Columbia University — No data yet released
• Cornell University — No data yet released
• Dartmouth College — 20,550 applicants
• Harvard University— 39,044 applicants
• University of Pennsylvania— 38,918 applicants
• Princeton University— 29,313 applicants
• Yale University— 31,439 applicants

SEE ALSO: Ivy League colleges offer free tuition to certain students — here's how financial aid packages stack up

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NOW WATCH: Here are the most elite boarding schools in America

At age 9, Milla Bizzotto is the youngest person to finish the Battlefrog Xtreme. The grueling course was designed by Navy SEALs, and lasts 24 hours. Bizzotto began strength training after being bullied at school, Cosmopolitan reports.

Story and editing by Alana Yzola

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French furniture design company Parisot has found a way to store a lot in a small amount of space. The Parisot Space Up Double Storage Bed essentially doubles as a closet.

Story by Ian Phillips and editing by Kristen Griffin

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Your rainbow panorama is designed by Ólafur Elíasson. It sits on top of ARoS Aarhus Kunstmuseum in Aarhus, Denmark, looping around the roof. It literally lets you see the city with a different lens.

Story by Jacob Shamsian and editing by Ben Nigh

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Different neighborhoods in the same city can often vary greatly in the amenities and atmosphere they offer residents. And if staying active is important to you, it's best to do some research on the neighborhoods that will help you accomplish that. 

Online real estate marketplace Trulia recently analyzed hundreds of neighborhoods in small, mid-sized, and large US cities to determine the best places to live a healthy, active life.  

The results are based on the percentage of quiet streets (based off of traffic volume), the number of "active" amenities on Yelp (like playgrounds and parks), the number of health-centric amenities on Yelp (like hospitals and doctor's offices), and the amount of footpaths and trails (not including sidewalks). 

Interestingly enough, a large majority of the top 20 neighborhoods were in Los Angeles and Seattle.

SEE ALSO: The 20 best big US cities for families

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20. Old Torrance: Torrance, California

Percentage of quiet streets: 51.7

Number of play-centric amenities per square mile: 2.7

Miles of trails/footpaths per square mile: 1.1

Number of care and essential amenities per square mile: 4.6

19. East Flushing: Queens, New York

Percentage of quiet streets: 48.7

Number of play-centric amenities per square mile: 3.4

Miles of trails/footpaths per square mile: 1.1

Number of care and essential amenities per square mile: 7.7

18. Melrose: Los Angeles, California

Percentage of quiet streets: 65.6

Number of play-centric amenities per square mile: 2.7

Miles of trails/footpaths per square mile: 0

Number of care and essential amenities per square mile: 3.6

Contrary to what many men think, there is a measurable difference between a suit jacket and a blazer.

And that difference could make or break your business casual outfit.

Whether or not you can take that suit jacket and wear it as a blazer is almost entirely a case-by-case basis.

Before we jump into some specific rules and things to look for, first I want to make you aware of the easiest way to tell:

If you look at the suit jacket away from the trousers and think that it looks like it's missing its partner, that's a dead giveaway you can't wear it as a blazer.

The goal is to be able to look at a guy wearing a blazer, and not be able to tell if that jacket is supposed to belong to a pair of dress pants.

If you're still not sure, here are some other things to look at:

• Color. Light gray and navy are very safe, and will probably work. Black and charcoal are a little riskier. Keep this in mind. 
• Pattern. Most patterned suit jackets won't work as a blazer. The good news is that if you've got a large enough suit collection to have a patterned one, you probably don't care if you can wear it as a blazer or not. Pinstripes and window panes are both no-nos, but a thicker fabric might offset this.
• Fabric. A fabric like tweed or other "classic" fabric, however, will nearly always work in a blazer context, according to Real Men Real Style. The thicker and less shiny the fabric, the easier it would be to pull off.
• Details. Though this is no longer quite the case, the difference between blazers and suit jackets was all in the detailing like buttons and stitching. Those have largely gone away, but new ones to watch, like if there are peak or notch lapels, should be paid attention to. (Peak lapels mean it probably won't work as a blazer).
• Fit. Blazers should fit slightly looser than suit jackets. A good rule of thumb is if you can wear a sweater underneath it, it can be worn as a blazer, according to GQ.

SEE ALSO: These are the most popular shoes for guys right now

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NOW WATCH: This robotic tailor can put you in the perfect suit in less than 10 seconds

High-school senior Brittany Stinson learned on Thursday that she was accepted into five Ivy League schools: Yale, Columbia, the University of Pennsylvania, Dartmouth, and Cornell.

She also got into Stanford, which has an acceptance rate of 4.69% — a lower rate than any of the Ivy League schools.

Stinson shared her Common Application essay with Business Insider last week, which we published in full here.

It was a lighthearted reflection of her inquisitive personality, told against a backdrop of her childhood trips to Costco.

Stinson explained how she chose her topic.

"Before I even started writing an essay, I read a quote from an admissions officer that said if your essay is on the ground and there is no name on it and one of your friends picks it up, they should know that you wrote it," she said. "I used that to help guide me."

Stinson also acknowledged the difficulty of expressing herself in fewer than 1,000 words.

With that in mind, Stinson said, "I really tried to think of my defining qualities, and narrowed it down to one or two qualities I wanted to convey to admissions officers."

In the end, Stinson used a playful tone to convey those qualities. At one point, she said that her purchase of a hickory-smoked ham at Costco spurred a conversation between her and her father about the controversial nature of former US President Andrew Jackson — aka "Old Hickory."

This humorous approach likely distinguished her essay from the thousands of others Yale and other schools received.

"I knew I was capable of weaving in humor into the essay," she said, "and I knew that with kids that have similar extracurriculars and scores, you need to stand out when it comes to the essay."

SEE ALSO: The most competitive university in America isn't in the Ivy League

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NOW WATCH: KAREEM ABDUL-JABBAR: College athletes are 'being exploited'

The FUBi Fixie is a fixed-gear bicycle that folds in half for easy storage. It also has a classic look most folding bikes lack.

It is currently crowdfunding on Indiegogo, and selling for $535.

Story and editing by Carl Mueller.

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If you're looking to get married in the Big Apple, get ready to shell out — it'll cost an average of $82,299, according to a recent report by wedding website The Knot.

Getting married on the island of Manhattan is, on average, $20,000 more expensive than in the second-most expensive place to wed in the US, Chicago. It's also $50,000 more expensive than the average across the US, $32,641, The Knot found.

Why are weddings so expensive in the city that never sleeps? 

Brides in Manhattan spend the most on their wedding gowns ($2,710), while, for comparison, Montana brides spend only $967.

Manhattan weddings also have the oldest brides (32.8 years old on average) and oldest grooms (35.4 years old on average), which might mean there is more disposable income to go around.

Manhattan also tied with Long Island for the most black tie dress code weddings, with 38%.

Still, it's important to remember that the average figures don't tell the whole story. Slate reported in 2015 that the median costs of weddings in Manhattan is actually $55,104, much lower than the reported average. It seems that there must be a few really, really expensive weddings that are bringing the average up to more than $80,000. 

Slate also points out that these numbers could be inflated for the benefit of the wedding industry, making anything cheaper than the average look like a "good deal."

SEE ALSO: Guys, here's exactly what you should wear to that wedding you have coming up

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NOW WATCH: A Russian oligarch threw his son a $1 billion wedding

Thinking about tying the knot? You're probably wondering if — and how — such a big commitment will impact your relationship.

A friend who knows I'm in a long-term relationship recently sent me a New York Times' opinion piece titled "13 Questions To Ask Before Getting Married." What she probably doesn't know is that she sent me on an entirely different research mission: to see what we know about the effect marriage actually has on peoples' happiness.

Sure, you may have heard that married people report being happier overall over their lifetimes than single folks, or that people tend to say they're more "satisfied" with life just after their weddings.

But is it actually the act of marriage that's causing those benefits?

Probably not.

In fact, there's loads of evidence to the contrary: A 2012 study found that couples who lived together but were not married had higher self-esteem and were happier overall than their counterparts who were married. A 2011 review of the impact of happiness on major life events found that couples who got married generally felt less happy and less satisfied over time than couples who had not.

More importantly to me than all these negative studies, however, was a recent bright spot in the research which suggests that it isn't marriage that's the key to happiness, but the quality of the relationship itself.

A 2014 working paper from the National Bureau of Economics Research found that if the person you call your partner (or significant other, or whatever) is also the person you see as your best friend, you don't actually need to be married to reap the benefits of a long-term relationship. And it's this factor, rather than getting married (or not) that appears to matter the most for happiness.

'Maybe what is really important is friendship'

For their 2014 paper, the researchers' initial findings appeared to support the "if marriage, then happiness" idea: They found that couples who were married tended to have higher happiness levels than couples who were not.

But the second part of that finding threw it out the window: It turned out that the couples who were best friends and lived together were just as happy as couples who were best friends and married. In other words, marriage didn't appear to matter much at all.

To arrive at their conclusions, the researchers studied three separate data sets that included information about thousands of couples: The United Kingdom's Annual Population Survey, the British Household Panel Survey, and the Gallup World Poll. Then, they controlled for couples' age, gender, income, and health conditions (all of which could potentially affect their results).

Here's a chart from the study comparing the "life satisfaction" of couples who were married (blue bars) with couples who lived together but were unmarried (red bars). Couples who said their partner was their best friend are on the left.

People in a relationship who saw their significant other as their best friend and either lived with that person or married them were happier than couples who saw their best friend as someone outside of the relationship.

"What immediately intrigued me about the results was to rethink marriage as a whole," University of British Columbia economics professor and study coauthor John Helliwell recently told the New York Times. "Maybe what is really important is friendship, and to never forget that in the push and pull of daily life."

This study isn't the first to arrive at this finding.

Other research backs the idea that marriage isn't the key to happiness

In 2012, four authors published a statistical analysis and summary of 18 studies of people who wed and eight of couples who divorced. Social psychologist Bella DePaulo recently took another look at that meta-analysis in a blog post for Psychology Today.

Here's what the authors found, DePaulo writes:

"Except for that initial short-lived honeymoon effect for life satisfaction, getting married did not result in getting happier or more satisfied. In fact, for life satisfaction and relationship satisfaction, the trajectories over time headed in the less satisfied direction."

But that's not all.

"What is really remarkable about the combined findings of the 18 studies," writes DePaulo, "is that the designs were biased in favor of making marriage look good. At least 11 of the studies included only those people who got married and stayed married."

In other words, the results of this larger paper can't tell us a whole lot about the results of marriage. Rather, they really only give us insight into what happens to people who get married and stay married. We don't know much about what happens to those who get married and then get divorced or separate.

"Too many social scientists simply are not going to give up on the claim that getting married makes you happier," DePaulo writes.

For another 2012 study (this one a survey of American couples), researchers found that couples who lived together but were not married had higher self-esteem and were happier overall than their married counterparts. Both types of relationships, however, were still linked with increases in overall well-being. Other studies suggest that marriage might even be more closely linked with negative outcomes than positive ones: A 2011 review of the impact on happiness of major life events found that couples who got married generally felt less happy and less satisfied with their lives over time.

The key takeaway here? Find a partner you consider your best friend. And don't worry so much about the other stuff.

UP NEXT: Giving thanks could be the key to lasting relationships

SEE ALSO: I tried the app that links you with a therapist over text, and it completely changed my view of therapy

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NOW WATCH: The simplest way to get — and stay — happy, according to psychologists

Five-year-old Lizzy Myers has a rare disease called Usher Syndrome, which will gradually make her blind. She's busy checking off her "visual bucket list," and most recently checked off meeting Pope Francis.   

Story and editing by David Fang

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Iskra Lawrence is one of the new faces of Aerie, a line that features un-retouched lingerie and bathing suit ads. But while Lawrence is a badass when it comes to social media, she's no stranger to cyberbullying. When one commenter called her a "fat cow," she responded in the greatest way.

Story and editing by Alana Yzola

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A wheelchair prototype, made by doctors and engineers in the Minneapolis Veterans Administration, helps paraplegics stand up and move at the same time. The wheelchair is not yet commercially available, but the inventors — Gary Goldish, Andrew Hansen, and Eric Nickel — hope to bring it to the market soon.

Story by Jacob Shamsian and editing by Stephen Parkhurst

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For the uninitiated, watches can be pretty intimidating.

Quartz or mechanical? Simple or complicated? Cheap or expensive? It doesn't really matter — the most important thing is that you wear one.

Our friends at Onpointfresh.com have created a helpful infographic that shows the most popular models at every budget, so it's easier than every to pick your daily companion.

SEE ALSO: The easiest way to upgrade your watch for spring

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NOW WATCH: These are the watches worn by the smartest and most powerful men in the world

Have a spare syringe laying around? Why not make a vegetable slicer? With it you can cut any cylindrical food, like carrots or hot dogs. YouTuber Shake the Future turned a syringe into a vegetable slicer. Here's how he did it.

Story and editing by Carl Mueller.

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If you ask Huffington Post founder and editor-in-chief Arianna Huffington about the key to success, she'll tell you it all comes down to sleep.

She should know; she learned this lesson the hard way.

In 2007, exhausted from getting only a few hours' sleep a night and running on fumes, Huffington's body finally surrendered to her sleep deprivation. She awoke from her inevitable and unplanned slumber in a pool of blood after hitting her head on the way down.

This was the wake-up call the media mogul needed to finally prioritize sleep, and now, with the release of her sleep manifesto, "The Sleep Revolution," she wants to help everyone, from world leaders to the everyday worker, to get a better night's sleep.

Huffington admits that she's no sleep scientist, but in researching her book, she's spoken with enough of them and delved into enough research to be considered an expert on the topic.

In her book she brings to light jarring data that includes what she calls "our current sleep crisis" (about 70% of American workers describe their sleep as "insufficient") and the cost of not sleeping, like irreversible brain damage and erectile dysfunction.

Business Insider recently spoke with Huffington about the importance of sleep, its elusiveness in our modern society, and some best practices to get more of it.

This interview has been edited for clarity and length.

SEE ALSO: Arianna Huffington destroys the macho ‘no sleep’ mentality

DON'T MISS: Arianna Huffington says these are the things you should never do before bed

Rachel Gillett: Why is sleep so important?

Arianna Huffington: Let's start with our brain. We used to think that sleep was a time of inactivity, and now we actually know that sleep is a time of frenetic activity. That's the time when the planning system of the brain — what they call the lymphatic system — is actually activated and cleans up all of the accumulated toxins from the day. And if that doesn't happen, the results are really tragic, including leading to Alzheimer's disease.

The brain has two functions: Either it's alert and awake, or asleep and cleaning up. That's why we are now reevaluating as a culture the importance of something we thought we could get away without doing.

The health aspects are a little more obvious. We all know that when we've been sleep-deprived for a little while, we are more likely to catch a cold because our immune system is suppressed. But sleep is much more important than that, because every disease, whether it's heart disease, diabetes, or cancer, is connected to sleep deprivation.

Gillett: What are some of the most surprising or counterintuitive research findings you came across about the importance of sleep?

Huffington: One of the most counterintuitive findings has to do with weight. We think that in order to lose weight, we need to hit the gym early in the morning, even if it means that we don't get all of the sleep that we need.

Well, no. If you want to lose weight, stay in bed until you've had enough sleep. We now have all of this scientific evidence that shows that if you are sleep-deprived, your body actually craves the very foods that are going to put on weight like carbs and sweets. Also the hormone that regulates hunger is suppressed, and as a result, you're more likely to be hungry all of the time.

We've all been there, you know, in the middle of the afternoon, we get really, really tired, we're dragging ourselves through our meetings, and we go for that doughnut or that sugary pick-me-up. That is the worst thing that we can do for weight. So sleep if you want to lose weight.

Gillett: What's the business case for getting more sleep?

Huffington:McKinsey recently put out a study that makes very clear in scientific terms the connection between business leadership and getting more sleep. At first I thought it was an Onion headline actually, to have McKinsey consultants writing in the Harvard Business Review about the importance of sleep for business leadership, especially because one of the consultants was identified as a McKinsey sleep specialist. But no, it's not an Onion headline; it's the truth.

The science shows that the prefrontal cortex, where the executive functions that are part of leadership — the problem-solving functions, the team-building functions — are housed, is degraded if we don't get enough sleep. So all of the things we value in business are going to be affected in a negative way if we don't get enough sleep.

If you think about it, it's kind of amazing how we've all been living under the delusion that the most successful people in business are people who are working 24/7. In fact, leaders and executives have regularly congratulated people for working 24/7, which we now know is the cognitive equivalent of coming to work drunk.

And from the point of view of the bottom line, there's a direct correlation between sleep deprivation and an increase in stress and negative health effects. Therefore healthcare costs go up and productivity is impaired.

Situation: You've got a wedding, gala, or other similar event coming up on Friday, and it's the beginning of the week. You look in the mirror and see that your hair is dangerously overgrown.

You must make an appointment for a haircut this week. What day should you choose to look the best for your event?

If you answered "the day before" — sorry, but you're wrong.

Tuesday or Wednesday would actually be your best bet, as it turns out most professionals would recommend a buffer of one or two days,according to Max Berlinger of The New York Times.

This lets the cut "settle" and ensures your hair looks less freshly shorn for your big event.

This also allows enough time for any corrections to be made before the big event, if the event really is of that much importance that your hair must be perfect.

Nick Wooster, who is widely regarded as one of the most important men's style icons of today, even told The Times, "Some barbers say the only difference between a good haircut and a bad haircut is three days."

This matters more the shorter the haircut, and with scissor cuts it matters a little less. Don't let this affect your choice to get the haircut that would be best for you, however.

SEE ALSO: How to get the best haircut for your face shape

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