The QuickDraw Microfilter System draws upon decades of expertise in filtration and hydration to provide adventurers the best user experience of any fill-and-squeeze water filter on the market. The easy-to-use system comes in two parts: the durable and taste-free 1 Liter QuickDraw reservoir and the hollow fiber filter cartridge. Weighing just 3.3 oz and filtering up to 3 liters per minute, the QuickDraw system ensures quick and easy access to clean water on any adventure. You can either shake-to-clean the hollow fiber filter or perform a tool-free backflush to ensure the fast flow rates will stick around for the duration of your trips. With its inside/outside (I/O) dual-thread design, the QuickDraw filter cartridge securely adapts to smartwater bottles and other Platy bottles and reservoirs allowing you to develop your ideal system to confidently explore the wilderness. Effective: Each microfilter is individually tested to ensure it meets all EPA & NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa* Hollow Fiber Advantage: Hundreds of tiny hollow fibers enable the microfilter to filter water faster than traditional filter media