Warm up your morning routine with this color-changing Harry Potter mug that features the Hogwarts™ house crest designs amid shiny gold stars. The black and red ceramic cup displays the faceted images of all four house mascots on the front — representing Gryffindor, Hufflepuff™, Ravenclaw™ and Slytherin™ — while the back image of the Gryffindor lion magically appears when you add hot liquid to the mug.