3dRose mug_195413_3 Worlds Most Awesome Roommate Magic Transforming Mug, 11-Ounce Fill with hot liquid to transform from black to white, magically revealing image White ceramic mug with black outer surface; image printed on both sides A perfect gift for any occasion; Fascinate them every time by revealing a secret or surprise image A perfect gift for any occasion; Fascinate them every time by revealing a secret or surprise image