The Portable Beverage Heater allows a sleeker, cleaner alternative to heating up your coffee with a USB pad. It also solves the constant reheating the cup issue that us tea and coffee drinkers tackle far too often. It's made of a molded plastic, but it's a single-use device that can be clipped to the side of a mug. According to its designer, Seungheon Lee, it creates heat from solid and organic body form using fuel cell and its thermographic ink changes color to indicate when the beverage is hot. Portable Beverage Heater will keep your coffee warm, until your long and tired conference is ended. I could use a handful of those.