Pizza Pack started with a simple frustration: why does a cardboard box that held six slices of pizza have to take up an entire fridge shelf? Founder Tate Koenig brought the solution to Shark Tank Season 14 Episode 1, turned down a $1.5 million buyout from Mark Cuban, and partnered with Lori Greiner instead. The result is the pizza storage container that sold out overnight and has been in kitchens across America ever since.