Shark Tank: Season 9, Episode 4

9 - 4: Benjilock, Ice Shaker, Solemender, Delighted by Hummus

Chris Gronkowski from Colleyville, Texas, his brother Rob Gronkowski from the New England Patriots, and the rest of the Gronk brothers bring an insulated sports bottle to the Tank. Mark Cuban and Alex Rodriguez offer sage advice to a 17-year-old from St. Louis, Missouri, who devised a tool to quickly soothe foot pain; an entrepreneur from Phoenix, Arizona, with a nutrition and culinary background, has a sweeter way to eat a popular snack; and a man from Los Angeles, California, hopes to lock up a deal with his innovative way to keep belongings safe.