Vacuum sealing soup is possible but requires a different method than sealing solids
You can vacuum seal soup, but not in the way you vacuum seal chicken or vegetables. A standard vacuum sealer pulls air out of the bag while it seals, which forces liquid into the machine and damages it. The solution is to freeze the soup first, then seal it — or to use a specialized container designed for liquids instead of a bag.
The core problem is that vacuum sealers work by removing air and then heat-sealing the opening. Liquid soup gets sucked up into the vacuum chamber before the seal completes, coating the internal components and eventually breaking the machine. Freezing the soup solid beforehand prevents this because the ice stays in place while air is removed.
Key Takeaways
- Freezing soup solid before vacuum sealing prevents liquid from entering the machine and damaging it.
- A marinating container or vacuum-seal container with a lid lets you seal liquid soups without freezing them first.
- Flat freezer bags work better than upright bags for frozen soup because they stack and thaw faster.
- Frozen vacuum-sealed soup lasts three to four months in the freezer, compared to two to three months in a regular container.
Freezing soup before you seal it
The safest method is to freeze the soup completely, then vacuum seal it. Pour the soup into a flat freezer bag, lay it flat on a baking sheet or plate, and place it in the freezer for at least four hours or until solid. Once frozen, the soup will not move during the vacuum process, and you can seal the bag normally.
Flat bags are better than upright ones because they freeze faster, take up less space, and thaw more evenly. A one-quart bag of frozen soup thaws in a few hours on the counter or overnight in the refrigerator. You can also reheat it directly in a pot — just cut open the bag and pour the frozen block into a saucepan over medium heat.
The downside is the time investment. If you need to seal soup today and use it tomorrow, freezing is not practical. For meal prep or long-term storage, it works well.
Using a vacuum-seal container instead of a bag
A vacuum-seal container is a rigid plastic box with a lid that connects to your vacuum sealer. You pour the soup directly into the container, place the lid on top, and run the vacuum cycle. The machine removes air from inside the container but does not pull liquid into itself because the container has a separate chamber.
Popular brands include Rubbermaid Brilliance, FoodSaver containers, and Oster vacuum containers. These typically cost between $15 and $40 per container. They work with most home vacuum sealers that have a "container" or "accessory" port on the front or side.
The trade-off is that containers take up more freezer space than flat bags, and they are less flexible if you need to store different portion sizes. A container holds a fixed amount — usually one to three quarts — so you cannot adjust the volume the way you can with bags.
Using a marinating container for liquid storage
A marinating container is a vacuum-seal accessory designed specifically for liquids. It is a shallow, wide tray with a lid that sits on top of your vacuum sealer. You pour soup into the tray, place the lid on, and the machine removes air from the space above the liquid without pulling the soup itself into the sealer.
Marinating containers are cheaper than rigid containers — usually $10 to $20 — and they work with most standard vacuum sealers. They are also shallower, so they take up less freezer space than upright containers. The main limitation is that they hold less volume, typically one to two quarts.
How long vacuum-sealed soup stays fresh
Frozen soup that has been vacuum sealed lasts three to four months in a freezer at 0°F or below. The same soup in a regular airtight container lasts two to three months because air exposure causes freezer burn and flavor loss over time. Vacuum sealing removes that air, so the soup stays fresher longer.
Refrigerated soup in a vacuum-sealed bag lasts three to five days, the same as soup in any other airtight container. Vacuum sealing does not change how quickly bacteria grow in the refrigerator — it only slows oxidation and drying. If you want soup to last longer than a few days, freezing is necessary.
Soups that work best for vacuum sealing
Broth-based soups freeze and seal better than cream-based ones. Chicken broth, beef broth, vegetable soup, and minestrone all freeze well and maintain their texture when thawed. Cream soups like chowder or bisque can separate when frozen and thawed, though they are still safe to eat — stirring usually brings them back together.
Soups with large chunks of meat or vegetables freeze better than pureed soups because the solids help stabilize the liquid. Soups with pasta or rice can become mushy after freezing, so consider cooking the pasta or rice separately and adding it when you reheat, rather than freezing it in the soup.
What not to do when vacuum sealing soup
Do not try to vacuum seal hot soup. Heat causes steam, which gets pulled into the machine and can damage it. Let soup cool to room temperature before freezing or sealing. Do not use a standard bag without freezing the soup first — the liquid will enter the vacuum chamber and ruin the sealer.
Do not overfill containers or bags. Leave at least one inch of space at the top so the seal can form properly. If you are using a bag, leave two inches to account for the heat-sealing strip. Overfilled bags often leak during freezing as the soup expands.
Frequently Asked Questions
Will vacuum sealing soup in a bag work without freezing it first?
No. Liquid will be pulled into the vacuum chamber and damage the machine. You must freeze the soup solid first, use a vacuum-seal container, or use a marinating tray designed for liquids.
Can I vacuum seal soup and then freeze it?
Yes, if you use a container or marinating tray. If you use a bag, freeze the soup first, then seal it. Sealing first and freezing second will not work with bags because the liquid will enter the machine before the seal completes.
How do I thaw vacuum-sealed frozen soup?
Move the sealed bag or container to the refrigerator and let it thaw overnight, or place it in a bowl of cold water for a few hours. You can also reheat it directly in a pot over medium heat without thawing — just cut open the bag and pour the frozen block in.
Does vacuum sealing soup prevent freezer burn?
Yes. Freezer burn happens when air touches frozen food and removes moisture. Vacuum sealing removes that air, so soup stays fresher longer — typically three to four months instead of two to three months in a regular container.
What is the difference between a vacuum container and a marinating tray?
A vacuum container is a rigid box that holds more volume, usually one to three quarts. A marinating tray is shallower and holds less, typically one to two quarts. Both work with liquid, but containers take up more freezer space.