Store yogurt, sour cream, and cottage cheese containers upside down in your refrigerator. Less air gets in that way and they keep fresher longer.
With the rising prices of food, this can help you conserve your food dollars.
Note: To prevent possible leaks, place the upside down container in a saucer or small dish before you place it on the refrigerator shelf.
Ice cream in the freezer upside down helps reduce freezer burn too