The Civilized Cap - humangear capCAP+ is a 2-in-1 cap that turns wide-mouth openings into a comfortable drinking spout Compatibly Made - Designed to work with most popular wide-mouth drinking bottles like Hydroflask, Camelbak, Nalgene, and more Secure, Easy Open - Rubberized grips make for an easy twist open even with gloves on, while the CapKeeper notch holds the small cap in place while you drink Responsibly Made - Drink to your health! We use FDA food-safe material that is BPA-free, PC-free, and Phthalate-free Design Made to Last - Since 2007, humangear believes design comes from empathizing with those who seek what's reliable, multi-functional, and sustainable. We're passionate about creating evolved products to help humans and the planet, too The capCAP+ is the civilized 2-in-1 accessory cap for any wide-mouth bottle, now compatible with bottles from Hydroflask, Camelbak, Nalgene, and more. The latest generation of the original capCAP, the capCAP+ has been redesigned to include more secure seals for both the small and large caps, as well as a new CapKeeper tab on the strap that holds the small cap out of the way when drinking.