What Our Gearhead(R) Experts Are Saying: "I use the Streamer II in my running vest and it fits perfectly. The wide opening is clutch for fast refills at aid stations, and being able to reverse it for cleaning is a total game-changer-no more funky reservoir smell." When the trail demands focus, the Deuter Streamer II 1. 5L Reservoir keeps hydration simple and seamless. Designed by HydraPak(R) specifically for smaller packs, running vests, and bike bags, this compact hydration system delivers smooth flow and quick access without slowing us down. The wide top opening makes mid-ride refills and post-run cleaning effortless, and the ergonomic slide-clip closure seals things up securely-even during technical descents or fast-paced efforts. Fully reversible for easy scrubbing and drying, the Streamer II 1. 5L is lightweight, BPA-free, and PFAS-free for clean, worry-free hydration on every outing. It's also compatible with Deuter's 28mm filter, making it trail- and travel-ready from the singletrack to the backcountry.