Let me say first that I don't store NEAR as much ammo as lots of folks on this board. But I do stock various calibers, and up to now I'm using multiple ammo boxes, like the zombie boxes, etc. I'm looking for ideas for ammo storage in larger containers. Is it necessary to have a waterproof oring seal? I would be putting dehumidifier packs in whatever I use. I do not need storage for the next few decades, but really just for the next year, etc. I recently bought some of the "dry as a bone containers" advertised on this site, which will be great for the range/field, but I'm looking for larger, home storage. Thanks.