The spill proof stopper can be easily installed on the straw hole, not only forms a seal, but also holds the straw in place. It can your drinking straw dirt and , very practical and convenient. Whether you're traveling, engaging in outdoor activities, or using it in your daily life, this Spill Stopper Set is practical, widely used for traveling, camping and so on. Features -Color:White -Material:Silicone -Size:5.50X2.00X1.00cm/2.16X0.79X0.39in -Size:2.00X2.00X1.00cm/0.79X0.79X0.39in - The material is safe and flexible, which is wear resistance and practical for the lasting time use. - This bottle cap spill proof stopper is mainly designed to prevent water spilling, also, replace the spill proof stopper frequently that can prolong the lifespan of your bottles. - Features the simple appearance, very convenient and easy to install. Fine workmanship its details. - With the nice sealing performance, they can effectively prevent water leakage, convenient to replace. - It has a simple design, but very practical in use, giving you a . Package list: 2 x Spill Proof Stoppers 2 x Leak Proof Stoppers