The HydraPak Seeker 4L transforms how you think about backcountry water storage, delivering an ultralight 104g solution that holds enough water for cooking, cleaning, and bottle refills without weighing down your pack. This collapsible water container crushes down to almost nothing when empty, tucking neatly into its included storage bag to free up precious pack space for the gear that really matters. Built with durable TPU construction and RF-welded seams, it's tough enough for serious adventures yet light enough for ultralight backpacking, while the 42mm opening accepts most threaded water filters for safe drinking from natural sources. Whether you're hiking remote trails, setting up basecamp, or need reliable water storage for multi-day adventures, the Seeker's streamlined design and leakproof performance make it an essential piece of kit that adapts to however you explore the outdoors.