Nalgene Replacement MultiDrink Water Bottle Cap - NAL-1-0461-25 (Grey) Features a versatile design that allows you to sip through a straw or chug your drink fast This wide mouth cap allows for easy filling and cleaning The spout can be tucked inside the cap to keep it clean and out of the way; The spout also features a lock option to keep it in place Fits the Nalgene 63mm water bottles; Can be used with the Nalgene 32-ounce wide mouth water bottles The drinking straw is not included