I've had a few of those in my shopping cart for a couple weeks, just getting ready to place my order soon. Those would be pretty nice to keep PP in too, as would Baby Soda Bottles.
BTW, using the little PP capsules in conjuction with cotton balls would also work. In very wet conditions if your balls get soaked (no snickering!

) an open fire would still light them and get the PJ burning.
Just tossing it out there.