Can you Freeze Fresh meats in Supermarket Wrappings?
The key here is how long you will leave it in the freezer. You can leave it in its wrapping if you will use it in a month or two. The U.S. Department of Agriculture recommends for longer storage (over 2 months) that you add a second wrapping. Overwrap with airtight heavy-duty freezer foil, freezer paper or place the package inside a freezer bag. What is the reason behind the second wrapping. It helps to maintain quality and prevent "freezer burn". Supermarket wrapping is permeable to air especially over time.
It is safe to eat freezer burned meats, but they may be dry in spots. Freezer burn causes grayish-brown leathery spots because air reaches the surface of the food. Cut freezer-burned portions away either before or after cooking. Discard heavily freezer-burned foods for quality reasons.
Can you Freeze Milk?
Pasteurized milk can be frozen, however it may separate or become slightly grainy when thawed. Frozen milk can be used for cooking, but some people may find it’s okay for drinking.
Freeze milk in plastic freezer containers or special freezer-proof glass jars. You will need to leave some extra space at the top since milk expands during freezing. If packaged in a wide-mouth container, leave 1/2-inch head space for pints and 1-inch for quarts. If packaged in a narrow-mouth container (such as jars), leave 1 1/2-inch head space for either pints or quarts.
Plan to use frozen milk within a month. Thaw milk in the refrigerator. Stir well before using.