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Dont just leave it at food items.
Flood prone? Seal important documents.
Going bush? Seal a set of dry gear.
I guess, at a push, you could even seal a rifle for a trip into wet country,

Great idea. Also very good for keeping some light tinder material for an emergency

I own 2 vacuum packing machines and use them a lot for day to day food storage. Extends the shelf life of fresh produce by heaps.
One of my machines also has the ability to plug into 12v ciggy...