Dinosaurs once ruled the entire planet. (Now they only rule the House of Representatives.) 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!