Osprey hydraulics lt 15l reservoirospey have incorporated an ingenious magnet system into the bite valve with a simple turn onoff which means the hose and bite valve remains secured when not needed but will deliver instant liquid on demand they made the whole system from taste free anti microbial materials able to withstand either freezing or boiling water features made from an anti microbial mpe filmanatomically shaped hydraulics reservoirrapidfill wide mouth cap for easy cleaning12 t