The 15 biggest 'Shark Tank' success stories of all time

"Shark Tank"/ABC

Entrepreneurs who make it onto a "Shark Tank" episode have the opportunity to introduce their company to a viewing audience of 7 million potential customers.

The companies that land a deal with one or more of the show's investors then have the chance to scale and, in some cases, become a nationally recognized brand.

We looked through old episodes and asked the Sharks themselves about their most successful deals. Read on to learn about the biggest "Shark Tank" success stories so far.

Scrub Daddy

A sponge company has far and away become the biggest "Shark Tank" success story. Over the past three years, Scrub Daddy has brought in a total of $75 million in revenue, according to investor Lori Greiner.

Greiner made a deal with its founder and CEO, Aaron Krause, in Season 4 for $200,000 in exchange for 20% equity. At that point, Krause had struggled to reach $100,000 in sales over 18 months, but Greiner saw great potential in the company's signature offering, a proprietary smiley-faced sponge that was more durable, hygienic, and effective than a traditional one.

She helped Krause expand his product line and brought them onto QVC and into stores like Bed, Bath & Beyond, where they have become bestsellers.

Tipsy Elves

When Robert Herjavec invested $100,000 for 10% of Evan Mendelsohn and Nick Morton's ugly Christmas-sweater company in Season 4, it could seem to viewers that he was betting on a fleeting fad. It turned out, though, to be his most profitable "Shark Tank" investment, he told Business Insider.

To stay ahead of trends, Herjavec helped make Tipsy Elves a year-round novelty apparel company that can capitalize off multiple holidays and college-football season.

Before its 2013 "Shark Tank" appearance, Tipsy Elves made $900,000 in annual revenue. Last year it brought in around $8 million, and this year it's on track to make $12 million, according to the company.

Breathometer

In Season 5, Charles Yim got a five-Shark deal for Breathometer, a portable Breathalyzer that works with a smartphone. Mark Cuban, Kevin O'Leary, Daymond John, Herjavec, and Greiner got in on a $650,000 deal for 30% of the company.

Since his "Shark Tank" appearance, Yim secured an additional $6.5 million in funding, partnered with the prestigious Cleveland Clinic, and developed a more accurate and more portable main product in addition to a device that tracks oral health and hydration levels.

Yim told Inc. that Breathometer is expected to end 2015 with $20 million in sales — double last year's number.