mastos

thumb|Black-figure mastos, ca. 530 BC, with combat scenes ([[Walters Art Museum)]]

A mastos (Greek, μαστός, "breast"; plural mastoi) is an ancient Greek drinking vessel shaped like a woman's breast. The type is also called a parabolic cup, and has parallel examples made of glass or silver. Examples are primarily in black-figure or white ground technique, though early examples may be red-figure. A mastos typically has two handles and a "nipple" at the bottom, though some examples have a foot as a base instead. A mastoid cup is conical, but with a flat bottom, with or without handles.