3dRose 113849_4"Elegant Pink with Black and White Polka Dot Monogram Letter J Two Tone Mug, 11 oz 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