WOPUTUO 0.5L Mini USB Fridge Cooler and Warmer Refrigerator with Cooling Warm Function Small and light, novel appearance, 0.5 liter mini fridge holds up to 1 cans of soda Supply by USB power,especially suitable for computer use,no batteries required With functions of heating and cooling,lower noise and no pollution, less consumption Cooling Can be placed in one cans (diameter of 66mm) of Sprite, cola, beer, juice and beverage can. Heating can be placed in one cans (diameter of 66mm) of beverage can,but can not heating for cola,sprite or carbonated beverage