I would put a sealable plastic bag (or two) in there, with purification tablets. You have a knife & a fire stick. You dont need tinder because you can find or manufacture it, You can make hooks & line, deadfall traps etc, although food is not exactly a priority, and you can use a stone to sharpen your knife. So that leaves the two most important priority's, Fire & Water. You have covered fire so purifying and being able to transport water is whats left.
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I don't do dumb & helpless.