# How to vacuum seal soup and other liquids Source: https://freezeandseal.com/blog/how-to-vacuum-seal-liquids Published: 2026-10-09 Publisher: Freeze & Seal **Short answer:** Cool soups and liquids quickly, then chill them in the refrigerator before sealing. In a chamber vacuum sealer, fill the bag no more than about half to two thirds, keep the seal area clean and stop the vacuum or seal early if the liquid starts to bubble. With an edge sealer, freeze the liquid flat in the bag or in a container first, then seal it frozen. This page is for anyone who wants to vacuum seal soups, stocks, sauces, marinades or other liquids for the freezer or sous vide. Liquids are the classic weak spot of edge vacuum sealers and the classic strength of chamber machines, but both can work with the right method. We cover food safety first, then step by step methods for each type of sealer, plus tips on bags and labeling. Background on why chamber machines handle liquids is in [how a chamber vacuum sealer works](https://freezeandseal.com/blog/how-does-a-chamber-vacuum-sealer-work). ## Food safety first: cool fast, then chill Hot soup should not sit out to cool slowly. USDA guidance is to refrigerate leftovers within 2 hours, and dividing large pots into shallow containers helps them cool quickly. An ice bath around the pot also speeds things up. Vacuum sealing does not make soup shelf stable. Removing air does not kill bacteria, and some, including Clostridium botulinum, grow without oxygen. Sealed soup belongs in the refrigerator for short term use or in the freezer at 0 F for longer storage. Never store vacuum sealed soup, stock or sauce at room temperature. Shelf stable soup requires a tested pressure canning process; see [what foods need pressure canning](https://freezeandseal.com/blog/what-foods-need-pressure-canning). Note: Refrigerate within 2 hours of cooking, keep the fridge at 40 F or below, and freeze at 0 F. Thaw sealed soups in the refrigerator or in cold water, not on the counter. ## Why liquids boil in a vacuum Water boils at a lower temperature when pressure drops. In a deep vacuum, even lukewarm liquid can start to bubble and foam. In a chamber sealer, that foam can reach the seal area and ruin the seal, or in bad cases get into the pump. Chilling liquids gives you a wider margin before boiling starts, and many chamber machines have a stop or seal now button for exactly this situation. Edge sealers have a different problem: they pull air out through the bag opening, so liquid is drawn straight toward the pump. That is why the freeze first method is the standard workaround. ## Method 1: chamber vacuum sealer A chamber sealer is the easiest way to seal liquids. The bag sits upright or flat inside the chamber, and equal pressure keeps the liquid in place. 1. Chill the liquid in the refrigerator until cold. 2. Fold a 2 to 3 inch cuff over the top of a chamber bag to keep the seal area clean while filling. 3. Fill the bag no more than about half to two thirds full. Unfold the cuff. 4. Place the bag in the chamber with the liquid below the seal bar. Some owners prop the bag at an angle or use a bag holder. 5. Set a slightly lower vacuum level or shorter time if your machine allows. 6. Start the cycle and watch through the lid. If bubbles rise toward the bag mouth, press stop or seal now. 7. Check the seal, label the bag and lay it flat to chill or freeze. ## Method 2: edge sealer with the freeze first trick If you have a regular edge sealer, freeze the liquid before you seal it. Some edge sealers have a moist or liquid setting or a drip tray that catches small amounts of liquid. These help with marinated meat but are not designed for bags of soup. If you seal liquids often, a machine from our [best vacuum sealers for liquids](https://freezeandseal.com/best/best-chamber-vacuum-sealer-for-liquids) guide will save time. 1. Pour chilled liquid into an embossed vacuum bag or a freezer safe container. 2. Lay bags flat on a sheet pan and freeze until solid, often several hours or overnight. 3. If you used a container, pop out the frozen block and put it in a vacuum bag. 4. Vacuum and seal the frozen bag as you would any solid food. 5. Return it to the freezer right away. ## Bags, portions and labeling Smooth chamber bags are fine in a chamber sealer and cost less. Edge sealers need embossed bags. For soups, portion into amounts you will use at one meal, and freeze bags flat so they stack and thaw quickly. Label every bag with the contents and the date. Flat frozen soup bags can be warmed in a pot of water if the bag is rated for heating, or thawed in the refrigerator. Check the bag maker's temperature rating before simmering or sous vide. - Portion for one meal per bag - Freeze flat on a tray, then stack - Leave room above the liquid for a clean seal - Label with contents and date - Use bags rated for the temperatures you plan to heat them to ## Marinades, sous vide and freezer times For marinated meat, chill the marinade, add only as much liquid as you need, and use the same chamber or freeze first method. In a chamber, the vacuum helps marinades work into the surface of meat. For sous vide, follow tested time and temperature guidance for the food, and cool and refrigerate or freeze cooked bags promptly if you are not serving them right away. Freezer storage times for soups are about quality, not safety. USDA FSIS lists soups and stews at about 2 to 3 months in the freezer for best quality; food kept constantly at 0 F stays safe longer, though quality drops. See our [storage life table](https://freezeandseal.com/tools/storage-life-table). [Sealers that handle liquids](https://freezeandseal.com/best/best-chamber-vacuum-sealer-for-liquids) ## Frequently asked questions **Can you vacuum seal hot soup?** No. Chill it first. Hot liquid boils easily in a vacuum, makes a mess and can damage the machine, and food safety guidance calls for cooling soups quickly in the refrigerator. **How do you vacuum seal liquids with a FoodSaver?** Freeze the liquid first in the bag or a container, then vacuum seal the frozen block. Some models have a liquid setting that helps with small amounts of moisture. **Is vacuum sealed soup shelf stable?** No. It must be refrigerated or frozen. Shelf stable soup requires a tested pressure canning process. **How full should a bag of liquid be?** In a chamber sealer, no more than about half to two thirds full, so the liquid stays well below the seal line. ## Gear guides for this topic - https://freezeandseal.com/best/best-chamber-vacuum-sealer-for-liquids - https://freezeandseal.com/best/best-chamber-vacuum-sealer - https://freezeandseal.com/best/best-vacuum-sealer ## Sources - [USDA Food Safety and Inspection Service](https://www.fsis.usda.gov/)