The container is a Film canister with petroleum jelly cotton balls inside. And the thing that looks like a screw, is portable aqua tablets sealed in a drinking straw. I melted one end together, stacked I think over twenty tabs in the straw and then melted the other end shut. Its water tight. In my EDC kit you can see a 4 white sticks, those are straws with petroleum jelly and cotton inside that have been sealed the same way. When you need them just cut off an end, squirt it out on your tinder, fluff it up a bit and stike the flint on there. Works like a charm and you dont get your hands all covered with crap.