Are you authorized to use this mug? After all, it boldly states "Property of the I.S.S. Enterprise" and features an image of the famed Mirror Universe starship right on the front. The Star Trek Property of I.S.S. Enterprise NCC-1701 11 oz. Mug is made of ceramic, is dishwasher and microwave safe, and comes packaged in an open-faced gift box. It belongs on your bridge!