DC Comics Batman (Graffiti Batman) Morphing 11 Oz. Heat-Activation Mug (with Gift Box) Officially Licensed Product This 11oz Morphing Mug transforms from black as hot liquid is added! Watch as the heat-activated process reveals the hidden image in full vivid colors! Color Changing Ceramic Mug Heat-activation reveals hidden image Not dishwasher or microwave safe and Printed in the USA