Romantic Married Series "Real Men Marry Teachers" (Twin Side) Magic Surprise Color Changing Mug Morphing Coffee/Tea Mug (11 Oz) Material:100% Ceramic Capacity: 11 Ounce Easy to clean,easy to carry Morphing:Just plain black in color when it's cold,mug will turn white and reveal Design only when filled with a hot beverage Our Custom Morphing Mug will be a good gift for your friends and family