This custom two-tone mug ceramic build is microwave & dishwasher safe, as is the printing on to these mugs. These custom dual-color mug is available in 2x sizes: 11oz and 15oz and white with black inside. .: Material: white ceramic with colored interior and handle .: Available in two sizes: 11oz (0.33 l) and 15oz (0.44 l) .: Rounded corners .: C-handle .: ORCA Coating