All aboard! This remarkable color-changing Harry Potter Platform 9 3/4 Hogwarts Express Heat-Sensitive Morphing Mug transforms from black to a vivid full-color image of the Platform 9 3/4 and the train to Hogwarts when hot liquid is added! Made of ceramic, it holds 11 ounces and weighs 1 pound. Hand wash only. Not dishwasher safe. Do not microwave.