A cup or bowl from which the bride and groom drink as part of a wedding ceremony. Now historical.

a cup or bowl from which a newly married couple, or their wedding guests, drink in celebration of the marriage; = bride-cup, n.

(a) a cup or bowl passed around at a wedding, from which the guests drink; (b) a cup or bowl of spiced wine, ale, or the like, prepared for a newly…

a cup of wine handed round at a marriage feast.