Good stuff, however I am not sure I would keep it the size of an altoids can, that is pretty small. You can still keep it small but I just think limiting yourself that much isn't that necessary. But all the more power to you if you get it done. I would definitely want some sort of fire starter, water purification, para-cord, and possibly some fishing items, just to name a few. Just my thoughts and if you already have them, disregard.