All Mazama tactical reservoirs feature a rugged, reliable design and made-in-the USA, PVC/BPA-free bladder film that is 25% thicker than our standard film, making these the most durable hydration bladders available. Mazama’s made-in-the USA film is taste-free and durable. Our reservoirs are designed to fit nearly all popular pack models. Check your bladder compartment size to determine if the 70 oz (2 L) or 100 oz (3 L) is your best choice. Based in trail-happy, Bend, Oregon, Mazama Designs is the source for premium hydration reservoirs and accessories as well as innovative hydration packs.