Platypus QuickDraw 1L Filter SystemFast and easy ultralight squeeze filter with multi vessel compatibility. Premium 1L Reservoir: Proprietary tri layer film dirty reservoir has an easy fill easy wide mouth opening, a fill handle, and is super durable and packableplus its guaranteed plastic taste free. Combine & Customize: I O dual threads and the ConnectCap let you dial in your custom leak free system using the clean and dirty vessels you prefer, like smartwater bottles and Platy