Battery Boxes

I buy my batteries in bulk and finally got tired of them rolling around in a drawer so I made up a few boxes to solve the problem. They all have the same exterior dimensions (within a small tolerance). The capacities are somewhat random but evenly divide into the bulk battery packs I purchase so there is some reason to my madness. I've made 9V, AA, and AAA boxes so far. Please comment with suggested improvements. Have fun.