Buy our exclusive Harry Potter mug set and save! This set of 5 mugs features the Hogwarts school crest and each of the four Hogwarts houses - Gryffindor, Slytherin, Hufflepuff and Ravenclaw - with its house crest and color theme. These white ceramic mugs hold 11 ounces of your favorite hot or cold beverage and are microwave and dishwasher safe.