Eggs
To help maintain quality, store eggs in the refrigerator promptly after purchase—large end up.
For best flavor and cooking quality, use eggs within 1 week if possible. Eggs held in the refrigerator for a long time may develop off-flavors and lose some thickening and leavening power.
Cover leftover yolks with cold water and refrigerate in a tightly covered container. Refrigerate leftover egg whites, too, in a tightly covered container. Use leftover yolks or whites within 1 or 2 days.