Now if they made rectangular clear plastic "buckets" in a couple different sizes that accepted Gamma lids ....

Edit: And at least one of the sizes was like a file storage box - letter file size one way and legal file size the other.

By the way, several years ago I began using a PVC pipe storage rack for file storage boxes that a friend found in the Skymall magazine. Turns out to be the handiest, most compact storage - highly recommended, though I did not check to see if they even sell it anymore. Paired with waterproof file storage boses this would be a pretty superior storage system.