I Found A New Cheap Way To Store Coins Airtight

That has been around for awhile now. I am wondering if the type of plastic is safe for unprotected coins to come into contact with? Here is another idea;seal-a-meal vacuum system,cost more and I don't know the safety factor in regards to the type of plastic they use for there bags either but you can make any size bag you want when you use there roll of plastic.It also comes with pre-cut bags.Just a thought.
John1

This shouldn't be the primary storage container. I would only use these with airtites, 2x2's, tubes, etc. Better yet, I would not use them at all. IMO, these are great for food, but not good for coins. Why? Putting a vacuum on the bag is just encouraging it to take on air and it certainly will. Over time, the seal will be lost and the bag will "inhale" air.

With a regular bag under normal, equalized pressure, gases will not be "drawn" into the bag. Air may slowly diffuse into the bag, but the effect will be must less than a bag under vacuum constantly trying to suck air in.

No, I don't think there'd be any harmful gases emitted by the bags themselves.