The traditional drink in Frankfurt and the surrounding State of Hesse is wine made of apples. I don’t really like to call it cider because English cider and French cidre are quite different. For one thing, the German version is sour, really very sour.
Traditionally, this kind of cider, called Äppler or Äppelwoi, is served in such ribbed glasses. The ribbing is supposed to prevent the glass from slipping when one eats greasy food at the same time.
That makes a case for beer, although in some Äppelwoi pubs it will not be served.
If it is drawn that badly and with so much foam, maybe a glass of Äppler is more inviting, after all.
Linked to Cee’s Fun Foto Challenge: Glasses, Cups and Saucers.