Description: The straw tip cover prevents water from spilling out of the straw and can stop debris and dust from entering through the straw. And the leak stopper can keep your cup completely spill proof. You can install the round spill proof plug in the middle of the inside of the lid for sealing, with a cross opening design to ensure that air enters when drinking water, making drinking water easy. Made of silicone material, it is dishwasher safe and reusable. Accessories including 2 straw cover, 2 square spill stopper and 2 round lid leak stoppers. It is compatible with tumbler 40oz/30oz only. Item Name: Spill Proof Stopper Material: Silicone Features: with Handle, Spill Proof, Good Flexibility Size Details: Size: 6cm/2.36" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 2 x Straw Cover 2 x Square Spill Stopper 2 x Round Spill Stopper