 All cold drinks in bars and restaurants are sold in glasses with a calibration mark ("Eichstrich") that is frequently checked by the "Eichamt" (~ Bureau of Weights and Measures) to ensure the guest is getting as much as is offered in the menu.Coffee is also very common, not only for breakfast, but also accompanying a piece of cake ("Kaffee und Kuchen") in the afternoon, usually on Sundays or special occasions and birthdays.It is generally filter coffee, which is weaker than espresso.