Emana custom morphing mugs the walking dead Coffee Tea Milk Hot Cold Heat Sensitive Color 11 Oz Ceramic Mug 3.74inch * 2.23inch,11 Ounce, 100% Ceramic design morph mug,Double-sided printing For Coffee,Tea or Hot Chocolate,soup Best choice gifts for friends, familys ,christmas. plain black in color when it's cold,turn white and reveal your design only when filled with a hot beverage