The 1.5L/50oz reservoir from CamelBakA(R) provides easy hydration in the form of hands-free sipping. Features and Specs Features Leak-proof cap is easier to open and close On/off lever lets you seal your drinking tube shut with one hand Hydroguard technology inhibits the growth of bacteria in the reservoir and tube Big bite valve self-seals after each drink, eliminating annoying drips Specs Capacity: 1.5L/50 fl oz BPA/BPS/BPF Free