Shark Tank S07E20 - BetterBack, Glacé Cryotherapy, Linka, Teaspressa

A Las Vegas woman pitches a product that can help relieve back pain; a brother and sister who call themselves the "Ice Siblings" talk about a cool way to reduce muscle inflammation; a mechanical engineer from Emeryville, Cal., demonstrates his high-tech bike lock; and the Sharks are served gourmet tea shots. Also: an update on a Philadelphia duo's all-natural deodorant invested in by Barbara during Season 7.