mary2. The magic mug is very funny. When the mug is cold, the mug is black. When the mug is hot (holding hot beverage), the mug turns white and any images that are sublimated onto the mug will appear. Buy your perfect mug and enjoy it now!. Mary Watercolor, Very Funny, Enjoy It, Don't Let, Mug Designs, Hot Drink, The Magic, Crop Top, Mug