Probably for a real long time, if the seal holds. One issue I have with vacuum packers, is that if the package gets banged around in the freezer....it is frozen and brittle and can get a small crack and leak. Now you have a freezer burnt item. I mostly plastic wrap (heavily) our meat products, then overwrap the plastic with waxed butcher paper, seem to work well for me. ON items I vacuum pack, I am carefull not to smack them around as I dig for steelhead bait at 3am....