Ideal for fast-moving groups, the QuickDraw 3L Gravity delivers the same fast, simple and ultra-versatile performance the QuickDraw lineup is known for in an effortless gravity-powered design.With a premium 3L reservoir, the QuickDraw 3L Gravity is ready to go right out of the box as the most complete system in the QuickDraw family, with the ConnectCap™ and Bottle Adapter delivering the most comprehensive reservoir compatibility of any QuickDraw system.• Combine & Customize: Accessories like the ConnectCap, a hose with a male CPC connector and the wide and narrow-mouth compatible Bottle Adapter allow the system to be tailored and optimized.• Premium Reservoir: 3L reservoir is taste-free and durable thanks to our proven construction technique and features a detachable hang strap to allow both gravity and squeeze filtering.• Fast Flowing: 1.75 liters per minute in a gravity setup and 3 liters per minute with squeeze pressure.• Ultralight: Weighing just 8.2 oz (233 g) it supports groups with clean water without weighing you down.• Integrity Test: Determine if your filter has been compromised from a fall or freezing by performing a simple integrity test.• Safe & Effective: Each filter is individually tested to ensure it meets all EPA & NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa.*• Comes with 3L QuickDraw reservoir, dirty-side cap, DrinkCap, ConnectCap™, Bottle Adapter, long hose with CPC connector, shutoff clamp and storage bag.* Includes Giardia, Cryptosporidium, E. coli, Salmonella and Cholera.