This Zak! Designs Harry Potter Hogwarts Houses Black To Color Heat Changing Mug is perfect for any fan of the franchise. The 15oz mug features the iconic Hogwarts Houses design in black and white, with a heat-changing feature that makes it special. It is made in China and is ideal for collectors or as a gift for a fellow Potterhead. The mug is not modified and is perfect for enjoying your favorite hot beverage.