The HydraPak Seeker+ 3L Water Storage with Built-In Filter is an ultralight and packable water storage solution with a water filter for backpacking. Solo or with a small group, this collapses for easy packing and is ready to fill directly at the source. The built-in filter twists directly onto the container, and water can be sipped directly from the high flow nozzle. Pour with ease into a friend's container with the help of the low-profile handle.