Cap off your favorite Canteen with ALL NEW Straw Cap. Simply pop open the top and drink with ease. Straw Cap fits 20oz and 40oz Corkcicle Sport Canteen. *Only fits wide mouth Sport Canteen. This will not fit canteens that come with the metal screw cap. This will not fit for the Hybrid Canteen. *Straw Cap comes with two attachable straw pieces. Sold separately from all Corkcicle Canteens.