The term 'tavern mug' can be summarized as a type of drinking vessel. It is also known as a STEIN, which is a German word meaning 'STONE'. The STEIN is a large mug, usually made of ceramic or pewter, with a hinged lid and a handle. It is traditionally used to serve beer, but can also be used for other beverages. The STEIN is often decorated with a variety of designs, such as scenes from German folklore or images of famous landmarks.