>>. I am curiouse as to how "Flints" glued to a tin can be used, as what do you do with them?<br><br>Start a fire. They're just regular lighter flints. Same as the idea somebody had of gluing 5 of them to a key blank and carrying it on your keychain. <br><br>I think most of the stuff inside my Altoids tin is fairly waterproof anyway. Candle, snare wire, fish hooks, fishing line, dental floss, needles, wire saw, metal rings for the wire saw (of different sizes, so one can fit inside the other), aluminium foil, Fresnel lens, 4 waterproof matches. The whistle has no pea to get waterlogged. I don't know about the hexamine tablet - would that dissolve in water? <br><br>How watertight is the round tin, anyway? (Would it survive a trip through the washing machine?) And realistically, how watertight does it need to be?<br><br>Philosophically, I tend to believe in redundancy rather than quality. Having the most expensive mag-flint combination in the world on my keychain is no use if my keys are in the aircraft ignition and the aircraft is under 40 feet of water.