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

I like these bottles for travel. Light weight. Collapsible. Don't leak. Perfect size. Won't break when dropped. I will fill one up with filtered water, then, for extra protection, use a SteriPen to sterilize the water. Good for CPAP and other medical uses. My one gripe is the lack of instructions. The bottle can be compressed into the two end caps, which are then snapped together. It arrives in this condition. But unsnapping the two plastic end caps, which should be straightforward, is anything but. It took several minutes, and ultimately brute force, to open the bottle up. The cartoon instructions on the bottle are not adequate.