'Cup' in the Bible

The cup of the blessing that we bless -- is it not the fellowship of the blood of the Christ? the bread that we break -- is it not the fellowship of the body of the Christ?

Ye are not able the cup of the Lord to drink, and the cup of demons; ye are not able of the table of the Lord to partake, and of the table of demons;

In like manner also the cup after the supping, saying, 'This cup is the new covenant in my blood; this do ye, as often as ye may drink it -- to the remembrance of me;'

for as often as ye may eat this bread, and this cup may drink, the death of the Lord ye do shew forth -- till he may come;

so that whoever may eat this bread or may drink the cup of the Lord unworthily, guilty he shall be of the body and blood of the Lord:

and let a man be proving himself, and so of the bread let him eat, and of the cup let him drink;