1.Improved sealing design: With silicone seals at both openings that ensure a leak proof experience; The screw cap spout improves the seal for worry drinking or pouring. 2.Seamless compatibility: Works with most wide mouth water bottles (2.28 inches in diameter) in sizes 14, 18, 40, and 64 oz. Our wide mouth design ensures comfort and enables effortless fluid intake. 3.Optimized drinking: With our replacement cap for water bottles, you get a narrow necked bottle for easy drinking, making it a practical addition on the go. Enjoy spill drinking with improved portability and comfort. 4.Convenient transport: Our replacement cap is designed to fit perfectly on most standard water bottles. It features a large ring handle for effortless transport and is built to withstand any beverage without breaking or deforming.