The beer mugs or beer steins as they were traditionally named, were usually made of stone, pewter, silver and maybe wood. Although most of those used in England were pewter. They were beautifully decorated and often had a lid. It is believed the lid was introduced during the period of the black plague to prevent diseased fleas hopping into your tipple.
Discussing the history of drinking vessels is very thirsty work, however this pub in Covent Garden is the best place to have such a chat.