Seedless Red Grapes.
It's best to eat grapes quickly after purchase. You can keep them for up to a week, unwashed, in a plastic bag in the refrigerator.
Grapes are extra-refreshing when eaten frozen. Wash and dry fresh grapes, then lay out on a tray and freeze. Transfer to an airtight container and store in the freezer, where they will keep for up to 3 months. Enjoy them frozen, but don't thaw they won't have much snap.