Episode 4

S9 E4: Chris Gronkowski from Colleyville, Texas, and his brother Rob Gronkowski from the New England Patriots, bring an insulated sports bottle to the Tank; Mark Cuban and former baseball slugger Alex Rodriguez offer advice to a 17-year-old from St. Louis, Missouri, who devised a tool to soothe foot pain; an entrepreneur from Santa Monica, California, 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.