Mickey and Minnie are having a glorious time skating, while Pluto looks on in the artwork surrounding this beautiful 11-ounce Disney Mickey Mouse and Minnie Mouse Sweetheart Holiday Thomas Kinkade Heat-Sensitive Morphing Mug. Add hot liquid and watch as the heat-activated process magically transforms the ceramic mug from black to a vivid full-color image! Do not microwave. Hand wash only. Not dishwasher safe.