3dRose 184967_3 80 is Like Turning 27 in Celsius-Humorous 80Th Birthday Gift Magic Transforming 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 Available in 11oz only; A fun and unique way to enjoy your favorite hot beverage A perfect gift for any occasion; Fascinate them every time by revealing a secret or surprise image Not microwave-safe, hand-wash to preserve image