The Osprey Hydraulics Lumbar 1.5L Reservoir Spare has been designed for compatibility with the Seral 7. A lightweight and convenient solution for carrying water. The Slide-Seal™ top-opening allows you to easily fill and empty the reservoir, whilst enabling complete access for cleaning after use.  The twin-welded circular baffles provide stability, maintain a flat profile and keep the liquid under control when you're out exploring rough terrain. The bite valve is magnetic enabling easy stow and access to water on the go. When not in use, the bite valve also incorporates an easy on/off twist lock system. All hydraulics reservoirs are built from strong yet light TPU material, which is designed to withstand either freezing or hot water and is BPA and PVC free. Osprey Hydraulics Lumbar 1.5L Reservoir Spare Features 180 degree on/off bite valve Bite Valve offers fast, smooth water delivery BPA & PVC free durable PE film Easy to replace Hydraulics™ hose Made from a tough durable TPU material Magnetic bite valve retainer Removable and replaceable hose and bite valve Slide-seal™ top opening for easy filling and cleaning Osprey Hydraulics Lumbar 1.5L Reservoir Spare Specifications Weight: 0.14 kg Main Fabric: TPU Film