Your new USB heating gloves keeping your hands warm now, but your coffee’s still getting cold in the mug? You could just get a thermal travel mug, but where’s the fun in that? If you really love your gadgets, you know salvation lies with the Universal Serial Bus—this USB Cup Warmer will wrap around your mug and keep the temperature of the contents constant for a mere $15.
https://gizmodo.com/usb-heating-gloves-163687
USB Cup Warmer [usb.brando.com.hk]
