How to Store Opened Canned Food

To store food from an opened can, transfer it from the metal can to a sealed glass or food-safe plastic container and refrigerate it. Opened canned food should generally be eaten within about 3–4 days, though the time can vary by food. Leaving the food in the opened metal can is not recommended. Once exposed to air, metal can interact undesirably with food, especially acidic foods. Transferring the contents to glass or another food-safe container helps preserve flavor and supports safe storage. Acidic canned foods such as tomatoes and pickles, as well as canned fish and meat, should be handled carefully and eaten soon after opening.

How Should You Store an Opened Can?
Use an appropriate container and keep the food cold. Transfer the contents from the can into a glass or food-safe container, seal it tightly, and refrigerate it at 4°C / 39°F or below. Any amount that will not be eaten soon can be transferred to suitable containers and frozen. Marking the can's opening date makes it easier to track storage time.

What Mistakes Should You Avoid When Storing Canned Food?
Some storage mistakes can affect both quality and food safety. Refrigerating food in the opened metal can may affect its taste and quality. Leaving it uncovered at room temperature for a long time increases the risk of spoilage. An uncovered container can allow the food to dry out and absorb refrigerator odors. Do not open or eat cans that are bulging, rusty, or have a domed lid.

Why Is a Bulging or Swollen Can Dangerous?
Discard cans with a bulging or domed lid, a swollen body, or gas escaping when opened; these signs may indicate dangerous spoilage. Do not taste the contents based on appearance or smell. Do not eat food from any can with bulging, rust, or leakage, regardless of its contents.

Can Food From an Opened Can Be Frozen?
If it will not be eaten soon, transfer the food to a suitable container and freeze it to extend storage time. Some foods may change texture after freezing and thawing; vegetables, for example, can become soft. Do not refreeze thawed canned food, for texture and safety reasons. Before opening, store sealed cans in a cool, dry cupboard away from direct sunlight. Follow the date on the can and do not eat food from rusty or dented cans. After opening, dividing the contents into small portions lets you take out only what you need and reduces air exposure for the rest. In brief, transfer the contents to a sealed glass container, refrigerate promptly, and generally eat them within about 3–4 days. Never eat from a bulging or swollen can. Marking the opening date helps track storage time.