glass (drinking)
bicchieri
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Bicchiere is used for any drinking glass. Calice refers specifically to a stemmed wine glass. Tazza is a cup (for coffee, tea). Each has its distinct context in Italian.
Bevo un bicchiere d'acqua prima di mangiare.
I drink a glass of water before eating.
Il cameriere porta i bicchieri da vino.
The waiter brings the wine glasses.