What does Luke 22:18 mean?

Jesus is presenting the first cup of wine of the Passover seder to the disciples. Presumably, He has taken a drink as here He makes a distinction between His prior and future actions. Scholars suspect this is the first cup of wine, which represents sanctification, because He gave thanks for it as is tradition (Luke 22:17); during the meal, the father thanks God for the "fruit of the vine" before the first cup.

Jesus' words here can be confusing. He is given some type of wine (Luke 23:36) on the cross. Does that imply a contradiction? Luke 22:15–16 gives context. Jesus says He has been looking forward to eating the Passover and He will not eat it again until God's kingdom is fulfilled. Considering the similarities in the wording, Jesus may be saying He will not drink wine at the Passover until after His second coming. Conversely, He may be referring to a cup of wine at a meal with friends.

Beyond that, the liquids mentioned at the cross don't apply. Soldiers offered Him sour wine. This is not the "fruit of the vine" Jesus is referring to: it's vinegar. Or a vinegar-water-spice mix commonly consumed by Romans. In addition, the passage doesn't explicitly say Jesus drinks the sour wine. The argument that the Bible is unreliable because of this verse shows how important context is.