Show your loyalty to your favourite Hogwarts House with this Official HARRY POTTER Hogwarts House Heat-Changing Mug Gift brand new in original packaging. Ravenclaw will be revealed, this mug is the perfect addition to your Harry Potter collection. Featuring intricate designs of each House's crest, this mug is perfect for sipping a hot beverage while reading your favourite Harry Potter book or watching the movies. The heat-changing feature adds a touch of magic as the House colours are revealed when hot liquid is poured into the mug. Add this collectable to your Harry Potter memorabilia and show off your House pride.