Mail Cage This old birdcage is the perfect place to stash mail and letter-writing essentials. To create your own cagey storage solution, scrub the framework of the cage with a bleach solution. Then clip off the wire from the front and back, leaving a few rows to act as mail slots. To create shelves, cut dowel rods slightly longer then the cage width and notch the wood to help it grab the wire. Cut glass or plexiglass shelves to fit and rest them on the dowel rods.