So far, Lubetzky’s investments on “Shark Tank” have included Yellow Leaf Hammocks, snack company Quevos, boogie board creator Tandm Inc. and HummViewer, a wearable hummingbird feeder.

Two friends tried to sell lemonade, headphones and hammocks without success. Their next idea landed them in Friday's "Shark Tank" episode. A Denver-based company will either sink or swim when ...

Together, they founded Yellow Leaf Hammocks in 2011, a Shark Tank–anointed company that sells woven hammocks made by the Mlabri tribe in Thailand. When Rachel first cast eyes on what she calls ...