3dRose 90012_2 Rainbow Trout Fish, Nature Center, Boise, Idaho-Us13 Dfr0528-David R Frazier Ceramic Mug, 15 oz, White 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