USB Heating Coaster with Adjustable Temperature, Can Boil Water at 100 Degrees, Heat to 55 Degrees, Suitable for Dormitory, Office, Desktop, Home Use, Multifunctional Cup Warmer, Thermal Insulation Heater, Constant Temperature Cup Base, Milk Warming Device, Plug-In
https://item.taobao.com/item.htm?id=693225707462
