I've seen pics on various sites of people with their survival supplies inside their Nalgene bottle. Is it a good or bad idea to use your Nalgene bottle for storage until you need it for water? How about waterproof matches (in a match safe) or a small bottle of hand sanitizer?

I just got a 32-ounce wide mouth bottle and moving all the stuff I had in a waterproof box to inside the Nalgene bottle would conserve a good bit of space.