The term 'drinking mug' can be broken down into two crossword solutions: STEIN (5 letters) and TOBY (4 letters). A STEIN is a type of mug or tankard, typically made of stoneware and featuring a handle and a hinged lid. It is traditionally used for drinking beer, and is often decorated with reliefs or inscriptions. A TOBY is a type of mug or jug, usually made of earthenware and featuring a handle and a spout. It is also traditionally used for drinking beer, and is often decorated with a figure of a man wearing a tricorn hat.