en_tn_condensed/1co/11/25.md

the cup

Possible meanings are that it was 1) the cup of wine that one would expect him to use or 2) the third or fourth of the four cups of wine that the Jews drank at the Passover meal. See Exodus 24:6 and 8.

Do this as often as you drink it, to remember me

"Drink from this cup, and as often as you drink from it, remember me"