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

Purchased two for our daily hiking bags. First time we used them, we were concern they would leak in our packs. Also worried about the durability. They held up on our first hike, but our concerns they would eventually leak or fail lead us to carry them empty as emergency spares. We carry a robust water filter and in a pinch, would use these as emergency water bottles, but we're not going to carry them full in our packs. They've worked great just sitting around our camp.