The straw tip cover helps prevent spills and keeps debris and dust out of the straw. The leak stopper provides a secure seal to help keep your cup spill-proof. The round spill-proof plug can be installed inside the lid and features a cross-cut opening that allows air to enter while drinking, ensuring smooth liquid flow. Made of silicone, this accessory set is durable, reusable, and dishwasher safe. Includes 2 straw covers, 2 square spill stoppers, and 2 round spill stoppers. Designed for compatibility with 40oz and 30oz tumblers only. Item Name: Spill Proof Stopper Material: Silicone Features: With handle, spill-proof design, good flexibility Size: Approximately 6cm (2.36 inches) Note: Color may vary slightly due to lighting and screen settings. Slight variations in dimensions may occur due to manual measurement. Package Includes: 2 x Straw Cover 2 x Square Spill Stopper 2 x Round Spill Stopper