USB Warmer Cup $ 20.32

The gadget has in-set Li-ion battery, it is easy to use portably, can recharge repeatedly. It supports in-set heating and warming function, automatic stirring function. It is compatible with PC hardware. Connect the USB interface on PC and the DC interface on cup using USB cable can start charging to the battery inside the cup. Moreover, it keeps your beverage at a comfortable 40°C and stirs everything up at the push of a button. You can recharge the cup's batteries using either an AC outlet or a USB port. http://www.chinabuye.com/usb-warmer-cup