The Civilized Cap - humangear capCAP+ is a 2-in-1 cap that turns wide-mouth openings into a comfortable drinking spout Compatible with most wide-mouth drinking bottles including Hydroflask, Camelbak, Nalgene, and other similar brands 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 Perfect for travel, camping, work commute, and more, humangear capCAP+ provides a comfortable drinking spout for when you're on the go. Easily transported, responsibly made, and conveniently designed. Good for people. Good for the planet.