Scrub Daddy Scratch-Free Sponge
Aaron Krause turned his Scrub Daddy smiley-faced sponge into one of the most successful Shark Tank products. It reportedly made $50 million in sales in 2017 after selling over 10 million sponges. But what makes this sponge so special? In warm water, it acts just like a regular sponge. But in cold water, it gets firmer so you can get rid of tough-to-remove stains without scratching your pots and pans.