Containers: Tasse, Glas, Flasche

Measures go directly before the noun — German has no “of”:

• eine Tasse Kaffee — a cup of coffee
• ein Glas Wasser — a glass of water
• eine Flasche Cola — a bottle of cola
• ein Stück Kuchen — a piece of cake

The measure carries the article; the drink or food just follows.

With a number, the feminine measures take their plural: zwei Tassen Tee, zwei Flaschen Wasser. Glas and Stück usually stay as they are: zwei Glas Milch, zwei Stück Kuchen.