Our popular Sport Cap features a soft silicone spout and improved valve. The silicone spout is completely removable for easy cleaning. This cap is packed full of useful features; dishwasher safe, attachment loop, and one-handed operation—quiet performance, removable spout, and 25% higher flow rate. NOTE: Compatible with Classic narrow mouth bottles only (with internal threads). Cap is NOT leak proof. Recommended for kids ages 4+.