My stored foods keep fresh two weeks longer by placing a 4 inch square of clear plastic wrap on top of the container before placing the lid on. This acts almost as well as a vacuum seal in preventing air from seeping in.
Milk stays fresh two weeks longer, condiments such as mayo, salsa, tomato sauce, cottage cheese, and yogurt all stay fresh with this simple air barrier. I cut 6-8 squares from plastic wrap and keep them with my storage containers. I use them religiously. No more mold or crusty surfaces, either!
By Avis from Boulder, CO
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