Just an FYI....
I had some of the "chlorine based" water purification tablets in sealed packets, placed into a Nalgene bottle with some other goods. When I opened the bottle the other night, there was a strong chlorine smell and my BIC lighter and P38 can opener were rusted/tarnished pretty well. I saw no evidence of a tear or rip, etc and all was dry when placed in bottle which was never filled with any liquids.
Soooo....I would advise separate ziploc for these guys and avoid metal contact!