On this Wikipedia the language links are at the mug cake with cake mix of the page across from the article title. This article is about the beverage container. A mug is a type of cup typically used for drinking hot drinks, such as coffee, hot chocolate, or tea. Wooden mugs were produced probably from the earliest days of woodworking, but most of them have not survived intact.
It was relatively easy to add a handle to a cup in the process thus producing a mug. For example, a rather advanced, decorated clay mug from 4000 to 5000 BCE was found in Greece. SW Colorado, made between 1000 and 1280 CE. The meaning of the carving in the handles is as yet unknown, but it is probably not functional. The biggest disadvantage of those clay mugs was thick walls unfit for the mouth. The walls were thinned with development of metalworking techniques.