Our original supergreen cap is back but only available as a spare cap. The cap is made from BPA free, non leaching polypropylene. Great cap for toddlers and younger kids who do not require a fast flowing sports cap. Robust, easy to use, free from leaks when in the closed position. The green spout lifts up to allow water to be sucked from the bottle. Close the green spout and the cap is secure and leakproof.