No plastic container provides a 100% airtight seal, though. Air and moisture will eventually leak in. Some people put desiccants in the container to help control moisture. But this also isn’t 100% sure.

I generally don’t like glass jars for long-term food storage. They are prone to breaking and wouldn’t likely survive a disaster like a hurricane. You also can’t fit much food into a jar. However, many preppers like to store their food supply in jars. 3. Vacuum-Sealed Jars Nothing beats a biscuit (or three) with a cup of tea. Store your sweet treats in a biscuit barrel and you won’t have to worry about losing them in cramped cupboards or discover bits of broken biscuit everywhere when it’s time for a clear-out. To keep your biscuits fresh - especially if you’ve baked them yourself - invest in an airtight biscuit tin. OXO GoodGrips has just the thing: with a push-button open and close feature, OXO’s 2.8 litre cookie jar has an airtight silicone seal, and it’s tilted for easy access. It’s also built to last with a lifetime manufacturer’s guarantee. Drink to thatDry canning is when you heat dry foods in a canning jar. The heat creates a vacuum, so it removes oxygen from the jar. It also seals the lid on the jar.