mattmayhem..in case CANOEDOGS can't get back for a reply... the black capped vial..halizone tablets were the most common water purification tablets for us Scouts in the 50's and 60's...though my Scoutmaster (an OSS vet)had us carry tincture of iodine...the top vial with cotton looks similar to an iodine ampule that came with "snake bite" kits... the Cutter snake bite kits, small bottle of iodine, matches in a safe, roll of electrician tape, Scout compass, and single edged razor blade, along with a couple of dimes, some string, and a whistle would fit in a GI first aid kit pouch... we couldn't afford real camping gear, so my stuff was GI surplus... stainless canteen and nested cup always on your web belt along with the first aid pouch...I think there was an angle headed flashlight too