Case closed Detective CONAN Anime Mug Changing Colorful Coffee Cup diameter: 3.1" Height: 3.9" capability:400ML It's the changeful mug, before add the hot water, it's black, and frosted face. It shows the pattern upon 40 C, it fully displays upon 70 C. Rugged packaging Hand wash only, Dishwasher use is not recommended. Be not suitable for using in the microwave, oven, dishwasher except ordinary ones on our web store.