Made of medical-grade silicone, valve doesn’t include any moving parts to break. Customers and industry experts all agree—it’s the best, no-drip system on the market. Includes bite valve and two straws for the spill-proof CamelBak® Bottle that makes it easy to stay hydrated on the go. * Just flip, bite and sip. * No tipping necessary thanks to straw and bite valve. * Vent valve on under side of cap prevents spillage even when bite valve is in the open position. * Straws can be cut to fit other bottles. Fits: 16 oz., 24 oz., and 32 oz. CamelBak® bottles |