The new Magnetic Replacement Bite Valve is designed specifically to work with the ALPS Reservoir 3.0 and is the perfect replacement to the reservoir's standard bite valve. The simple push-button shutoff bite valve makes getting water easy when you need it, and stops water flow when you don't. No more tedious clipping and unclipping, the replacement bite valve features a magnetic tethering system for holding your tube securely in place. FeaturesBuilt-in check valve eliminates backwash and prevents air from entering tubeConvenient one-handed twist open for no bite, high flowMagnet keeps drink tube in place until neededMagnet base fits 1" or 3/4" wide pack strapsFits 1/4" ID drink tube