Hi All, I'm trying to make a waterproof fire making kit for a youth group. An Altoids tin is roughly 4"x2.5"x0.75" Does anyone know of a waterproof case or at least water resistant case that is approximately those outside dimensions?

Actually the pouch I'm trying to put this box into is the outside pocket on a Maxpedition 10x4 bottle holder. The pocket measures 6"x3"x1.5" so I could probably go as big as 5.5"x2.5"x1" in size for the waterproof box.

I've looked everywhere, Pelican, Otterbox, Witz, bestglide. I found a fly box for anglers that was close but it has dividers inside and wasn't really even water resistant. Everything is too big for the pouch.

Bepreparedtosurvive.com and bestglide.com both have survival tins with a rubber seal in the lid but the tins are just a hair too wide.

If I can't find anything I may have to resort to waterproofing the altoids tins somehow by myself but I need 18 of them for my group and I'd rather just find something I can order.

Any ideas? Thanks y'all