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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.
Quick Answer. Caviar is a perishable food, and an unopened can or jar can stay fresh for approximately 4 weeks, while an opened container will only stay fresh for roughly 3 days according to About.com. Caviar must be stored properly in order to retain its delicate flavors, which means being kept at a temperature between 28 to 30 degrees Fahrenheit.