The capCAP by humangear is a revolutionary 2-in-1 accessory cap designed to enhance your wide-mouth bottle experience. Compatible with leading brands such as Nalgene, Cyclone, and Camelbak, this ingenious cap features a small spout for splash-free drinking and a large cap for easy cleaning and ice filling. The latest version boasts several impressive updates, including a rubberized grip for secure handling on both caps and a "Cap Keeper" notch to keep the small cap out of the way while you drink. A significant improvement in the new design is the enhanced cap-bottle interface, which now effortlessly fits popular stainless steel water bottles like HydroFlask and Klean Kanteen. Since its debut in 2008, the capCAP has become a favorite among outdoor enthusiasts, celebrating over a decade of innovation and user satisfaction. Constructed from 100% BPA-free, polycarbonate-free, and phthalate-free materials, the capCAP prioritizes your health and safety. Both caps use FDA-approved, food-safe polypropylene (#5) plastic, and the gaskets are made from food-safe silicone, ensuring a secure and reliable seal. With the capCAP, enjoy the perfect blend of convenience, compatibility, and peace of mind on all your adventures.