3dRose What Do We Want Coffee, When Do We Want it, Coffee Lover, 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 Microwave-safe, hand-wash to preserve image