Minimal design and durable construction packs where most hard bottles won't fit—simply flatten and roll when empty and stow in bail handle Internal baffle adds structure and provides a slim profile when full, making it easier to hold and easier to pocket; plus, it won't roll or bounce during activity Self-sealing silicone nozzle is spillproof and easy to drink from; an easy-to-open flip-cap cover keeps away outside elements Flexible bail handle provides comfortable carrying, quick attachment and easy hold while filling Easy-to-fill and backcountry-ready, this squeezable bottle is compatible with most 28 mm threaded water filters External capacity gauge allows you to track your hydration intake or measure out the contents Made of ultra-durable, abrasion-resistant thermoplastic polyurethane with RF-welded seams for superior durability and elasticity Can be frozen or filled with warm water (max temp: 140°F/60°C) 100% BPA- and PVC-free . . .