Looks like a great addition to the kit. I like the smaller one for drinking water, may try it out.
*the wine bottle and small water bags look great. I like the cardboard box too, you can secure the liquid and burn the box.
A few questions:
-how do you clean it inside? Is it simply disposable?
-great space saver but I prefer the security of strapping down jerry cans.
40lbs of water is the same as a 40lb dumbell, just harder to secure.
I used a similar Coleman water bag and found it frustrating to use and hard to secure inside the vehicle.
Maybe placing full ones inside a action packer or something...but defeats the idea of a bag.