Keep your tumbler fresh and spill-free with our Tumbler Flip Straw Lid, perfectly designed to fit 40oz Stanley Quencher Cups. This leak-proof and splash-resistant lid ensures a smooth and secure drinking experience wherever you go. The durable silicone cover provides a tight seal to prevent leaks, while the flip straw design offers convenient, mess-free sipping. Reusable and easy to clean, this lid is the perfect replacement accessory to keep your tumbler performing like new. Stay hydrated in style with this durable, eco-friendly, and travel-ready lid solution.