The Mazama Celilo Reservoir 2 Ltr features a rugged, reliable design and PVC/BPA-free bladder film. Mazama’s film is taste-free and durable. The Celilo Reservoir includes a high flow, original DesChutes bite valve. It also has a one-hand push button shut off. The bite valve has super magnets and a strap-mounted magnet retainer to ensure easy fluid access on the go.