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One way to store blueberries once they have been opened is to give them a vinegar bath.
Once it is opened you should dispose of it. Once oxygen reaches the substance it is no longer sterile and hence using it could cause infection.
There should be an expiration date on the container. But if there's not, then it should be good for about a year unless it's been opened. Once opened, store tightly covered in the refrigerator for about two weeks, then discard if not used by then.
Scotch that has been opened will last indefinitely if kept in a cool dark place.
If you can seal the container tightly, you can still store it in a cupboard for quite a while. Unfortunately, since the extract is usually quite volatile, you might be better off refrigerating it after opening it. Once opened, the vanilla will start to be oxidized by the air that gets into the container, so you can't store it indefinitely. Most people will use it up - or it will evaporate - before the degradation from oxidation causes enough damage to ruin the extract.
According to Buchtmann, you shouldn't store an opened can in the fridge once opened, as "the can dissolve into the food, giving it a metallic taste".
Once ketchup is opened, it should be refrigerated. if the cap is closed it doesnt have to be refrigerated
store in a cool dry place away from strong light and odurs. to retain freshness once opened keep in a airtight container
At room temperature in a dark cubord once opened store in the fridge
NO!
They built a new store opened 24 hours a day
All pickles need refrigeration, once the jar has been opened.