Okay, so I've been using the Rubbermaid and the OXO containers now for a couple months. The Rubbermaid has DRAMATICALLY reduced the use of ZipLock baggies, so much that I've now bought extra packages of them. Ditto the OXO. They may not be hermetically sealed, but they are so easy to use, so effective for my uses, and so ideal for storage
container size modules, that I have also purchased extra ones for home and boat. I opened another case of the Rubbermaids this evening to make room for some leftover beef stew, and the realization of how intuitive and easy to use these containers are struck me with the idea of getting even more.