[Luke]

Mat 26:29 But I say unto you, I will not drink henceforth of this fruit of the vine, until that day when I drink it new with you in my Father's kingdom.

Mar 14:25 Verily I say unto you, I will drink no more of the fruit of the vine, until that day that I drink it new in the kingdom of God.

Luk 22:18 For I say unto you, I will not drink of the fruit of the vine, until the kingdom of God shall come.

You cannot find a verse in scripture that says the liquid in that cup that was shared was alcoholic wine.

Isa 65:8 Thus saith the LORD, As the new wine is found in the cluster, and one saith, Destroy it not; for a blessing is in it: so will I do for my servants' sakes, that I may not destroy them all.

The only wine that is blessed is the new wine, the fruit of the vine, grape juice.