.
The common Greek word translated "wine" is oinos (oy'-nos) which suffices for both fresh beverage and spoiled; for example:
● John 2:7-10 . . Jesus said to the servants, "Fill the jars with water"; so they filled them to the brim. Then he told them, "Now draw some out and take it to the master of the banquet."
. . .They did so, and the master of the banquet tasted the water that had been turned into wine. He did not realize where it had come from, though the servants who had drawn the water knew.
. . .Then he called the bridegroom aside and said, "Everyone brings out the choice wine first and then the cheaper wine after the guests have had too much to drink; but you have saved the best till now."
Now the interesting thing is this; the word "wine" is never used even one time in connection with Jesus' last supper. No, not once. He labeled the beverage "fruit of the vine" in the gospels of Matthew, Mark, and Luke. (No communion details are given in John's gospel.)
NOTE: Grapes are not the only fruits that grow on vines. Berries do too, and seeing as how no specific beverage is listed in the menu for Passover in the twelfth chapter of Exodus, then we're left to guess at the species of fruit juice that Jesus and his men consumed during his last supper.
In my opinion, an intoxicating beverage is a bad choice to offer in modern communion services due to the fact that numbers of Christians nowadays are recovering alcoholics for whom even so much as a whiff of booze has the potential to cause them to fall off the wagon. Surely no "Christian" church wants to be responsible for that to happen!
● Rom 14:13 . . Make up your mind not to put any stumbling block or obstacle in your brother's way.
● Rom 14:21 . . It is better not to eat meat or drink wine or to do anything else that will cause your brother to fall.
And we certainly wouldn't want to break the law by serving underage children alcohol because it's not only illegal, but there's always the possibility of steering them early in life towards a drinking problem later.
● Matt 18:6 . . If anyone causes one of these little ones who believe in me to sin, it would be better for him to have a large millstone hung around his neck and to be drowned in the depths of the sea.
NOTE: According to Jesus' sabbath teachings; consideration for human life and safety moderates religious practices; so I seriously doubt that he would object to serving a non alcoholic beverage to remember his crucifixion rather than something stronger.
_