There's plenty of it left. I suppose we could bless it and all eat together. The eating and drinking together in His memory is the important thing, anyhow. If the day doesn't matter I suppose as long as we discern the Lord's body in a proper remembrance, what we use in the eating doesn't really matter either. We didn't pack any grape juice, but I do have some tomato juice.
Tomatoes grow on vines.
One kind of fruit of the vine ought to serve as well as another. So, around a campfire, late on the second day of the week, three Christians offered thanks for some cheese and tomato juice and ate and drank together in memory of the crucifixion of the Lord Jesus Christ. Paul departed from Athens, and came to Corinth. It makes no sense that Paul could have left the baptized believers at Corinth without having instructed them concerning worship. By turning the Lord's supper into a carnal feast to satisfy physical hunger, the Corinthians disobeyed the ordinances which Paul had delivered.