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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.
If you've got an excess of butter and need a long-term option, store it in the freezer. Simply wrap it in aluminum foil or seal it in a heavy-duty freezer bag and freeze for as long as six months if unsalted -- also called sweet cream -- or nine months if salted.