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If you keep it in your glove compartment for long time and those hard objects ( knife, spoon ..etc ) keep etching the plastic , wont that cause a health hazard when you fill it with water and drink "plastic beverage" ??

That would imply things are able to move around in there. I don't know about others, but I thought the whole idea of a PSK (or other survival pack) was to cram the thing so dang full that it distorts and stretches around the edges! ;-) Nothing moves around in there ... not in MINE anyways!

I doubt there'd be any significant health consequences to a few scratches anyway. At least none I'd worry about during a survival situation.