I guess boyscouts would know what this is, but I had no idea until I found one geocaching. When I saw in the description that it was a micro "waterproof match container," I was picturing a plastic matchbox, like a hide-a-key. What I found was this little green cylinder, just large enough to fit a bundle of matches. This particular one was quite cleverly hidden in some bushes, where it was propped up to look like plant food. Even the landscapers hadn't messed with it. I almost always find these in bushes, usually painted to match the surroundings.