With the Disappearing Dinosaur Mug, you can watch eons pass before your eyes as prehistoric beasts transform into museum fossils—just like the iconic specimens on display at the Natural History Museum of Los Angeles County. This 14 oz. ceramic coffee cup has a comfortable handle and arrives in a beautiful and colorful box. This heat-activated color-changing mug is microwave-safe, but not dishwasher-safe. Hand wash only. Don't soak. The perfect present for paleontologists, paleobotanists, museum enthusiasts, and anyone inspired by the wonders of natural history.