3dRose mug_93953_2 Oregon, Keizer, Labrador Retriever Dog Us38 Rbr0163 Rick a Brown Ceramic Mug, 15-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 Microwave-safe, hand-wash to preserve image A perfect gift for any occasion, Fascinate them every time by revealing a secret or surprise image