This ancient Greek phiale mesomphalos (libation bowl) dates to the Hellenistic period (ca. 4th – 2nd century BC). Phialai were wide shallow cups and some of them displayed a boss in the centre (omphalos). They were used for pouring libations to the gods and for drinking on more ordinary occasions as attested by several literary sources. Pindar, for instance, says:
“ἐγκιρνάτω τίς νιν (…) ἀργυρέαισι δὲ νωμάτω φιάλαισι βιατὰν ἀμπέλου παῖδ ̓’ “Let someone mix the wine now (…) and distribute in the silver phialai the strong child of the vine.”(Pind. N. 9.51f).