3dRose mug_85322_2 Koala Bear, Australia, Eucalyptus Tree Sa01 Ksc0000 Kevin Schafer 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