[troutman]

In Cologne (Koln) the locals drink delicious Kolsch from 0.2 L glasses. They bring you a tray full of these little glasses.

http://en.wikipedia.org/wiki/K%C3%B6lsch_%28beer%29

Kölsch should be served at cellar temperature (about 10°C/50°F, not near freezing). It is usually served in long, thin, cylindrical 0.2 litre glasses. This glass is known as a Stange (pole), but is often derisively called a Reagenzglas (test tube), or Fingerhut (thimble). Recently though, many bars have moved to satisfy their more thirsty customers by offering larger, less traditional glasses (0.3 l or 0.4 l) of the same shape, but connoisseurs would even drink it from smaller (0.1 l) glasses, called "Stößche" (Cologne dialect noun for a German verb "stürzen" = to gulp), as the taste of Kölsch, which has no carbonic acid added, is at its best when fresh on draught.

The rivalry between the cities of Cologne and Düsseldorf, bitter in the past but today mostly a humorous matter, is often expressed by the preference of one of these types of beer, and ordering the wrong kind in the wrong city has in fact resulted in abuse and even violence in the past, although today a couple of jokes about foreigners is probably all that would result.