Dinosaurs once ruled the entire planet, before becoming exrinct. Thanks to this clever Disappearing Dino Mug, you can watch eons pass before your eyes over a cup of coffee. The mug shows a prehistoric landscape populated by fierce dinosaurs. When you pour in a hot beverage the eons pass before your eyes as the dinosaurs transform into fossils in a museum exhibition. Now finally you will know what killed off the dinosaurs. It was YOU! 12 oz. Disappearing mugs are not dishwasher safe but are microwave safe.