Great for backpacking treks or long hikes, the Hydration Pack Fast Fill Adapters allow you to fill your hydration pack reservoir directly from your Sawyer screw on/off water filter without removing it from your backpack. The adapters attach directly to the 1/4-inch drinking tube on most hydration reservoirs (hydration pack and filter sold separately). This set of Hydration Pack Fast Fill Adapters is compatible with the Point ONE, Point ONE All-in-One, and MINI water filtration systems.Specifications and Features: Adapters attach to the directly to the drinking tube on most hydration reservoirs Attach the Sawyer Squeeze water filter to the adapters and squeeze water into your reservoir via the easy to attach drinking tube Compatible With: MINI Filters Squeeze Filters