- Crafted from high-quality food-grade silicone, our replacement flip lids are completely non-toxic, BPA-free, and odor-free, ensuring safety and peace of mind for daily use with your Stanley 40oz glass. - Engineered for superior performance, these lids feature a leak-proof design that prevents liquid spills, making them perfect for travel, outdoor activities, or daily commutes. Stay mess-free while enjoying your favorite drinks. - The innovative insulation allows your beverages to maintain temperature, keeping cold drinks chilled or hot drinks warm for hours, enhancing your on-the-go hydration experience. - Designed for convenience, the flip-top straw lid is dishwasher safe, simplifying cleaning. A removable straw enables thorough hygiene maintenance without the need for extra tools or effort. - Whether at the gym, on a hike, or during a long drive, our flip lids prove essential. They offer a reliable solution for hydration without the worry of leaks, making them ideal for active lifestyles. - Compatibility with Stanley 40oz glasses ensures a perfect fit, transforming your container into a versatile drinkware solution. - Durability you can trust: built to withstand daily wear and tear, these replacement lids serve as a reliable choice for your hydration needs. - Enhance your drinking experience with a functional design that combines practicality with style, setting you apart in any setting.