'Cup' in the Bible
The cup of blessing which we bless, is it not a communion of the blood of Christ? The bread which we break, is it not a communion of the body of Christ?
Ye cannot drink the cup of the Lord, and the cup of demons: ye cannot partake of the table of the Lord, and of the table of demons.
In like manner also the cup, after supper, saying, This cup is the new covenant in my blood: this do, as often as ye drink it , in remembrance of me.
For as often as ye eat this bread, and drink the cup, ye proclaim the Lord's death till he come.
Wherefore whosoever shall eat the bread or drink the cup of the Lord in an unworthy manner, shall be guilty of the body and the blood of the Lord.
But let a man prove himself, and so let him eat of the bread, and drink of the cup.