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Caviar Storage Caviar Storage Some caviar can be stored frozen for up to a year, and some others really should never be frozen at all, but should only be kept refrigerated. Caviar should be consumed on the same day that the tin is opened.
1 If the guavas are not yet ripe â they are still firm â put them in a plastic container or bag and they can keep up to about two weeks.  In the freezer, they last a lot longer, up to a year. To freeze guava, cut up the guava into a freezer container, and cover with a light simple syrup.