3dRose 203242_3"Best Ever-Gifts for Brother-in-Law-Black Text 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 A perfect gift for any occasion. Fascinate them every time by revealing a secret or surprise image A perfect gift for any occasion. Fascinate them every time by revealing a secret or surprise image