In the material culture of classical antiquity, a phiale or patera is a shallow ceramic or metal libation bowl. It often has a bulbous indentation (omphalos, "bellybutton") in the center underside to facilitate holding it, in which case it is sometimes called a mesomphalic phiale. It typically has no handles, and no feet. (A drinking cup with handles is a kylix. A circular platter with a pair of C-handles is not a patera, but a few paterae have a single long straight handle.) Although the two terms may be used interchangeably, particularly in the context of Etruscan culture, phiale is more common in reference to Greek forms, and patera in a Roman setting.