This hollow fiber filter cartridge attaches to Platypus and Smartwater bottles. As you drink the filter removes bacteria and protozoa. You can also squeeze the water from one container into another. To clean the filter cartridge simply shake it or use tool-free backflush methods. The Quick Draw filters up to 3L per minute and weighs just 80 g. Comes with a drinking cap, connecting cap with cover, and dirty side cap.