Originally posted by: gsaldivar
Originally posted by: Eli
Ziplog bags are in no way, shape or form air tight. Further, you will never get all the air out by squeezing the bag.
Not getting 100% of the air out of a container before closing it doesn't mean that the container itself isn't airtight.
Sealing stuff in a vacuum helps when you're storing it at room temp. or in the fridge. However when storing at freezing temp. it's fine to have a bit of air inside the bag, because the temperature is protecting against spoilage. The thing to check is that the bag is sealed so that the air trapped inside doesn't mix with the air circulating in the freezer, which leads to moisture-spoilage or "freezer-burn".
Even if the bag appears air tight, the plastic itself leaks. Molecule by molecule, the bag will seek to equalize pressure across its surfaces.
Thats why you use these
http://www.ziploc.com/double.asp ...