After Jeff's comment about Mylar bags being the best, curiosity got the best out of me. I don't believe light to be an issue since it's pretty well dark all of the time in the freezer, but I looked these things up. Well, Mylar bags are fairly cheaper than food savor bags. On amazon, you can get 50 quart sized Mylar bags for $16. I buy boxes of 20 quart sized food savor bags at Walmart for $10 or $12.