You can extend the storage time for another week if you refrigerate them in a plastic bag. The bag lessens dehydration and prolongs freshness. Simply place whole kiwis in a freezer-safe container and store them in the freezer for several months. Kiwi slices make great garnishes or additions to smoothies and other healthy treats. If you have extra kiwis on hand, you can slice them up and freeze them.  Slice the kiwis and sprinkle sugar on the slices to keep them firm and flavorful. Put the sugared kiwi slices on a cookie sheet and slide the sheet into the freezer. Transfer the frozen kiwi slices from the cookie sheet into plastic freezer bags. Store them in the freezer.

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Write a summary of the previous text in Indonesian:
Menyimpan Buah Kiwi Matang . Freeze whole kiwi fruit. Bekukan buah kiwi utuh.