Traditional 1-liter water bottles have been a backcountry staple for decades, but the Hydrapak upgrade is a welcome improvement. Durable, flexible and leak proof, the collapsible Stash bottle is 50% lighter than a hard bottle and saves weight and space in your pack. It’s 100% BPA and PVC free, and it fits almost every backcountry water filter. Admittedly, the soft sides can make the Stash difficult to put back into a holster or water bottle pocket if it isn’t full, but on a typical excursion, I drink from a hydration bladder and carry a couple empty Stash bottles so I can fill them up at camp for drinking and cooking water. Best of all, the thermoplastic polyurethane is naturally anti-fungal. For nearly two decades, Hydrapak has been creating rugged, safe, and more reliable hydration solutions designed for a variety of outdoor pursuits, from hiking, running, biking to backpacking. MSRP: $22.99. Hydrapak.com. //