I'm afraid I still can't grasp the popularity of Altoids tins for PSK's. Of course, I enjoy the old-fashioned styling as much as the next fellow, but they are heavy, non-waterproof, and way too small to boil water in. My choice is just a pair of small ziplock bags, one inside the other. Light, waterproof, cheap and replaceable (though much worse than the Altoids tin for boiling water in <img src="images/graemlins/wink.gif" alt="" /> ). So maybe your neck-carry cellphone thingy might be just the ticket...