Platypus Hoser Reservoir

The Platypus Hoser is a minimalist 2-litre hydration reservoir weighing 100 g, built with a silver-ion antimicrobial lining to slow bacterial growth inside the bladder between cleanings. The self-sealing HyFLO bite valve shuts off automatically when you're not drinking, cutting down on drips inside the pack, and it connects via a 1/4-inch drink tube compatible with most hydration-sleeve packs. The film is BPA- and BPS-free, matching current expectations for hydration gear. At 100 g for the reservoir alone, it's a straightforward companion for day hikes and multi-day trips where you want hands-free drinking through a pack's hose port, rather than a bottle you pull out and put away — the trade-off is a plain wide-mouth fill opening and no built-in insulation, so hot weather or freezing temperatures affect the water inside just as they would in any uninsulated reservoir.