【Leak proof Stanley Lid】:The stanley replacement lid 40 oz is equipped with a flip spill stopper and sealing ring that prevent any liquid leaking during use or storage, ensuring your drink stays safely inside. 【Versatile Compatibility】: Compatible with Stanley Quencher and Stanley H2.0 FlowState, these stanley flip straw lids offer versatility and convenience for different tumbler models. 【Convenient foldable Straw Design】:This flip straw lid for stanley 40 oz tumbler features an easy-to-use foldable straw for quick sipping, making it perfect for on-the-go hydration without any hassle. 【Premium Material】: Made of high-quality plastic, the stanley leak proof lid is food-grade and odorless, ensuring an irresistible sipping pleasure for everyday use. 【Complete Set】：The set is completed with 2 pcs stanley cup lids, 2 pcs sturdy straws, enhancing your experience. It’s simple shape and practical function, which are suitable for many occasions. The spill proof stanley lid is specifically designed for 40 oz tumblers compatible with Stanley cups, including Adventure Quencher Travel and Quencher H2.0 FlowState tumblers. The extra-long reusable straws provide an enhanced drinking experience, allowing you to enjoy every sip from your cup. Stay worry-free with these spill-proof straw lids that offer ultimate leak protection, making them an essential accessory for your positive lifestyle.