I didn't see these in this thread, but came across them a few days ago.
I was doing a search for the Gamma seals that Walton Feed sells, and I found that the Gamma Plastics makes these:
http://www.gammaplastics.com/new/vittles_vault.html
I found them at PetSmart today. They are food grade plastic, easy spin off lids, come in a bunch of different sizes and are suppose to keep pests out. They might be a pretty good deal for storing dry goods like oats or rice.