Milk can retain its freshness for up to one week after the expiration date on the carton.
Milk is better purchased in paper cartons which block 98 percent of the harmful effect of the light. The plastic containers in just four hours of store light can destroy 44 percent of the vitamin A in low fat and skim milk containers. Some markets have installed light shields to avoid the problem.
If milk is getting close to the curdling stage, try adding a teaspoon or two of baking soda to the milk. It will give you a few more good days.
milk will stay fresher longer, if you add a pinch of salt to each quart.
Cottage cheese will last longer if you store it upside down. Spores get into the cottage cheese and live on the oxygen layer when closed up. When you turn it upside down, you eliminate a percentage of the available oxygen and the spores cannot grow as fast.
Milk will not burn if you sprinkle a teaspoon of sugar on top of the milk before starting to cook. However, if you stir it, it may still burn.