The original Platypus water reservoir that became a backcountry classic, the Hoser is an ultralight, minimalist hydration system that delivers taste-free hydration with a versatile, durable design that makes it great for backpacking, thru-hiking, and day hikes. Updates include a new self-sealing HyFLO bite valve that delivers a 30% increase in flow rate, making it quicker and easier to hydrate on the go.