1. Designed specifically for travel tumblers, this adapter seamlessly integrates with the flavor ring, allowing you to easily add personalized flavors to your favorite drinks. 2. This product features a high-quality straw lid with an 8mm connection that fits most ice cream cups, allowing you to enjoy flavored drinks anytime, anywhere without worrying about spills or leaks during transport. 3. Equipped with an advanced system, a sensitive silicone valve automatically adjusts airflow to maintain balanced pressure, ensuring smooth, spill-free drinking every time. 4. This adapter is made of food-grade polypropylene plastic and safe materials, free of BPA, to ensure long-term performance and healthy use. 5. This product can make you fall in love with drinking water. Its interesting appearance and refreshing taste will make you not resist drinking water and make ordinary water taste fruity. It is easy to store and can be put away with the lid when not in use. It is clean and hygienic. Material: ABS Dimensions: 5.3*5.7cm/2.09*2.25in Packaging Contents: 1 straw lid, 3 flavor rings