Rigid containers are often reuseable and make the stacking of foods in the freezer easier. Cardboard cartons for cottage cheese, ice cream and milk are not sufficiently moisture vapor resistant to be suitable for long term freezer storage, unless they are lined with a freezer bag or wrap.
Single use containers, such as ice cream or milk cartons, should be avoided for freezer use. According to MSU Extension, use containers in the freezer that are moisture-vapor resistant, leak proof, and easy to seal.
A snowflake is probably the most easily recognizable indication of cold, which makes it the perfect symbol to mark freezer safe kitchenware.
Room can be left in containers to account for this expansion but it is not always able to prevent damage to a container. Polypropylene and PVC are both plastics that are brittle at temperatures below freezing. Polystyrene is considered brittle at 68°F and is very brittle at temperatures below freezing.
Rigid containers and flexible bags or wrapping are two general types of packaging materials that are safe for freezing. Rigid containers made of plastic or glass are suitable for all packs and are especially good for liquid packs. Straight sides on rigid containers make the frozen food much easier to remove.
Glass containers, in contrast, are toxin-free, easier to clean, and safe for freezing and heating. Choosing glass food storage containers helps reduce exposure to environmental toxins, which is crucial for overall health and reducing the risk of chronic illness.
Certain materials, such as glass and glycerol, may harden without crystallizing; these are called amorphous solids. Amorphous materials, as well as some polymers, do not have a freezing point, as there is no abrupt phase change at any specific temperature.
Food grade materials, such as aluminum foil, heavy freezer-weight plastic bags, heavy plastic wrap and parchment or freezer paper are excellent choices. It is safe to freeze meat or poultry directly in its supermarket wrapping, but this type of wrap is thin and lets air in.
This item is made of materials that are safe for freezer use. Please note that plastics are less flexible when cold or frozen and may break if dropped. Also note that water expands when frozen, so when filled to capacity the container could expand outwards.
Frozen Food and Power Outages: When to Save It and When to Throw It Out. A full freezer will hold a safe temperature for approximately 48 hours (24 hours if it is half full and the door remains closed).
Our borosilicate glass products can be put into freezer and can resist till -40°c.
If your Tupperware container has a snowflake symbol on it, don't worry about freezer damage—that symbol means it's freezer safe.
Our Ziploc® products are suitable for food contact use for microwave defrosting and reheating, room temperature, refrigeration, and freezing. Remember, it's always important to follow each product's usage instructions. Furthermore, Ziploc® brand products are made in accordance with Good Manufacturing Practices.
Yes, of course: aluminium is a low temperature resistant material and will not deteriorate when frozen, that's why aluminium food trays can also be put in the freezer without contaminating or spoiling your favourite dishes.
Proper food storage starts with choosing a freezer storage container made with materials that are safe for use. Available options include non-toxic glass, BPA-free plastic containers or storage bags labeled as freezer-safe.
If you have more eggs than you can use within a few weeks of buying them, you can break them out of their shells and freeze them. Freeze only clean, fresh eggs.
Zip-top bags are great for freezing food because it's easier to get all the air out of them than it is with rigid containers. And zip-top bags have an added space-saving benefit: You can stack them, if you lay them flat to freeze first.
Can I put glass in the freezer? Only if it says freezer-safe (usually tempered glass). Otherwise, it can crack and that's no fun. Also make sure to remember that liquids expand, and glass has no wiggle room, so if you're freezing in a freezer-safe glass container, you still want to leave a little room at the top.
Rigid containers made of plastic or glass are suitable for all packs and are especially good for liquid packs. Straight sides on rigid containers make the frozen food much easier to get out.
Snowflake-looking symbol? That'll mean that the container is freezer safe. Look for this symbol when you're thinking of storing some delicious leftovers in the freezer (stew, soup and more). For meal-prep buffs, this should be the symbol to look out for!
Glass containers
Glass jars and storage containers are microwavable, dishwasher-safe and often freezable. This puts them among the best ways to freeze food without plastic.
Jars with tapered sides or straight sides are freezer safe; shouldered jars are not.