A tasse à café is a cup, generally of white porcelain and of around 120 ml, in which coffee is served. It is also sometimes used to serve small portions of rich drinks, such as hot chocolate
The word originates from Arabic ṭās طاس, from the Persian ṭās طاس, meaning cup or bowl.
A half-sized cup is called a demi-tasse (English demitasse), literally "half-cup".