But while it's undoubtably awesome, it's not available yet, as it's a promotional product from a coffee company. However, you can sign up to be a tester. And if it's really that easy to make a heat-powered coffee cup display, this mug is only the beginning.
Ethan Wolff-Mann is the Gear editor of Supercompressor. He wonders what the iced coffee people are supposed to do. Follow him on Twitter @ewolffmann.