Ceramic Morphing Mug - Mickey Mouse Custom Heat Color Changing Mug Magic Coffee/Tea Mug (11 Oz) Best Gifts For Christmas New Years Birthday Festival and Yourself Material: 100% ceramic Come in 11oz sizes with a large handle. Perfect for coffee, tea, milk, hot cocoa, soup and more. Morphing:Just plain black in color when it's cold,mug will turn white and reveal Design only when filled with a hot beverage Treat yourself or give as a gift to someone special.