Description:Material: Our spill stoppers are made of reliable silicon, reusable and soft, durable and easy to clean, and can be washed by dishwashers.Practical Design: The straw cover keeps your straw clean and spill-free. The square plug securely seals the straw, while the round plug ensures a smooth drinking experience, and effectively stops debris and dust from entering your cups through the straw.Usage/Cleaning: Simply place it on your tumbler lid and press gently. It fits snugly and securely and is easy to clean either by hand or in the dishwasher, making it a convenient addition to your tumbler accessories.Versatile: The straw stopper is designed to fit most standard-sized straws, making it a versatile accessory that can be used with a wide range of drinkware, including cups, tumblers, and water bottles.Specification:Material: SiliconeSilicone Cap Size: 50mmx8mm/1.96"x0.31"(L*OD)Round Proof Stopper Plug Dia: 21mm/0.83"Square Lid Anti-Leak Stopper Long: 25mm/0.98"Color: BluePackage Contents：1 Set x Silicone Spill Stopper