A purpose designed bottle for running/hydration vests, with a vest-pocket-friendly oval/wedge-shape and soft structure (so there's less chance of rubbing). High Flow - Bite valve auto-seals after each sip, eliminating annoying drips. Large Mouth - Large 42mm opening lets you fill easily with ice and drink mixes. SpeedFill Cap - For fast refills on-the-go. Filter Friendly - Compatible with Katadyn BeFree, Salomon XA Filter, Lifestraw Peak Series filters. Comfortable Fit - Soft material conforms to most hydration vests, belts, or pack pockets. Compressible - Flexible design shrinks as you drink reducing water movement. Easy To Clean - Cap and valves come completely apart, top-rack dishwasher safe. Proven Performance - Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity. Safe And Reliable - 100% BPA & PVC free, top-rack dishwasher safe. Capacity: 500ml Weight: 46g Dimensions (full): 80x260mm