Interesting but I always use Ziploc. I don't know about keeping moisture in when all my package failures have been about keeping it out.
I double Ziploc bag all of the contents of my deployment care packages and it saves the day. Package sat in fuel? No problem!
On the ebay boards, everyone use to enjoy making fun of odd packing materials. Is that no longer the case? I mean, there used to be plenty of folks who would leave negative feedback for unprofessional materials. It made for some seriously uptight packing situations in the past.
One Ziploc saved this fabric pack from extinction.