I would like everyones opinion on the following. I've always preferred a metal container for my wilderness survival kit due to the fact that it is much easier to boil water in it than in tinfoil (which I also carry.) My current container is an altoids-type box I got from the christmas arts and crafts section of the local Walmart. It is about 5-1/2" X 3-1/2" X 1-7/8" and is big enough to house everything.
The downside is that it cannot be waterproofed for submersal. I know I can (and do) use ziplocks but I really don't trust them.
Is anyone aware of waterproof metal--preferably aluminum--boxes that are about this size? I don't mind paying more for them either as long as it's not too ridiculous. I'm also willing to put up with a little additional weight (within reason).
Failing that, do most of the people here just go with a plastic case for this sort of thing? I'd like to hear your suggestions.

Regards, Vince