Disney Mickey Mug Warmer  Disney Mickey Mug Warmer with Ceramic Mug Keeps Hot Beverages and Soups Warm and Includes 10 oz. Ceramic Mug. It can be used with other mugs that are flat on the bottom. It uses 110V. The mug is both microwave and dishwasher safe. There is a power off/on button that lights up when turned on.