Just in case you haven't heard of these commerical match cases, check out the K&M Matchcase at http://kmmatchcase.safeshopper.com/ .

I have both the long length version made to fit REI waterproof matches and the regular length version for regular kitchen matches. They are very VERY well made and easy-to-use. The lids don't screw into the body. Instead they smply push into the main body and then you twist the cap to tighten the cords and lock the cap down to the body. Simplicity at its best! Yes, they are a bit pricey, but you only need one (of each size <img src="/images/graemlins/grin.gif" alt="" />)

If you do get one, I suggest that you get some silicone gasket grease to apply to the o-rings. This keeps the seal better, makes it easier to insert the cap, and makes the o-rings last longer. I get mine at my local pool store.