How about a little fun for all of us. Each person posts what they think is the most important survival item, that HASN'T been mentioned already. As this gets going and the usual items are taken, it should show some imagination that we can all learn from.
The only rules are:
1. One post per person
2. No derogatory comments about someone else's choice.
My choice - 32oz Nalgene full of water.
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It's not that life is so short, it's that you're dead for so long.