Toast to the wizarding world with this Harry Potter Colour Change Glass. The themed glass is printed with the Hogwarts crest that's detailed with the symbols of the school's four houses-Gryffindor, Hufflepuff, Ravenclaw and Slytherin. Once a cold drink is added, the otherwise monochrome crest illuminates with a gold trim. This magical glass has the power to change the Hogwarts crest from black and white to colour by having cold liquid poured into it! It holds up to approx. 200 ml of cold liquid. Presented in a gift box. Official licensed merchandise. Not dishwasher safe. Dimensions: H: 18cm x W: 12cm x D: 12cm.