This Dinosaur Color Changing Mug is cool! It looks like a black mug until you fill it with your favorite hot beverage, then it reveals the colorful menacing dinosaur of your choice! It will surprise your house guests when they see it change from a plain black mug to a ferocious dinosaur (and could be forewarning them of your grumpy morning mood)! Made of ceramic. It comes in four styles and a box for gifting.