Review on Collapsible BPA & PVC Free Hiking Water Bottle: Hydrapak Stash For Backpacking Adventure! by Paul Freeman

Love the packability of this bottle combined with the wide mouth opening. I usually swear by Platypus bladders, but the narrow mouths make them hard to clean and hard to pour water into from another container when needed. I got this one to pair with my new GRAYL for when I want to be able to pour filtered water from the GRAYL into another bottle for higher capacity. Pro tip: It took me at least 15 minutes too long to figure out that you squeeze the sides to pop it open, rather than twisting, when it is compacted closed. I was really annoyed by how hard it was to open until I realized it just pops open and closed. :-)