Aloha bassnbear,

Great minds think alike huh?

I was thinking that with two canteens and their pouches, one of the side pouches can hold some redundant water purification and the other one some tinder and/or fuel. I also store my MP-1 tablets in a bag, but I use an Aloksak as it is rugged and can also serve as a back up water carrier.

When I am out, I carry the MP-1 tablets and either a Miox or a bottle of iodine crystals. I will have two out of the three types of chemical purification means. And then of course, there is boiling with the canteen cup or a cup that fits on the end of a nalgene bottle.