Canned food can maintain 1+ year in good state. However, when you open the can, the countdown starts.

I read it happens because microorganism from the outside reach the inside of the can.

My question is: Is it possible to keep food inside the just opened can free of microorganisms? Maybe moving immediately to an airtight container and take out the needed amount with a cleaned spoon? (If a cleaned spoon still contains microorganism --- why clean it in the first place?)

  • 1
    Clean spoon does not have food to feed the microorganism.
    – paparazzo
    Commented Feb 19, 2017 at 22:40
  • You will notice that stuff in an airtight container does have less propensity of spoiling catastrophically and quickly if only touched with clean utensils - but unsealing the can still degrades the content from "sterile/pasteurized" to "very damn clean"! Commented Feb 20, 2017 at 10:42

1 Answer 1



When you can something, the temperature and pressure kill bacteria and micro-organisms.

Once its exposed to air, you're exposing it to bacteria and micro-organisms. Despite you thinking the spoon is clean, it still has some bacteria and micro-organisms on it which will get into the food. And your "airtight" container is likely not nearly as airtight as a can.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.