Be careful not to say his name three times. Pour hot liquid into the Beetlejuice The Ghost with the Most Heat-Sensitive Morphing Mug and it's... showtime! The exterior of this 11 oz. mug transforms from black as hot liquid is added, revealing the hidden image in full vivid colors. Makes a great gift for fans of the hit Beetlejuice movie. Hand wash only. Not dishwasher safe. Do not microwave.