My PSK is Dougs kit, moved into a metal tin, and added a few more items. Not an Altoids tin, but close. I don't ever get into it (and hopefully never will, except to check the condition of the contents from time to time), so I have wrapped the edges with that rubbery tape electricians use that "melts" into itself. Then I wrapped the whole thing with paracord. My hope is that helps waterproof the thing. I have other goodies that I carry that are more readily accessable if I need them...