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4. Breathometer

Charles Yim holding up a prototype of breathometer on Shark Tank.
Charles Yim on Shark Tank | Sony Pictures Television

Curious if you drank too much and can no longer drive? This product turns your smartphone into a breathalyzer to give you the answer. Charles Yim went on the show in Season 5 with this product and left doing business with all five sharks — a first in the show’s history. They gave him $650,000 in exchange for 30% of the company.

The company was projected to make $10–12 million in 2014, according to the New York Post. It also became available to buy in Best Buy and Walmart.