💯No Spill & Leakproof: Engineered to prevent leaks and spills, even during active use. Ideal for travel, gym sessions, or daily commutes—no more messy surprises 💯Perfect Fit for Stanley Cup 40 oz: Specifically designed to replace the original lid of the Stanley 40 oz tumbler, ensuring seamless compatibility and a secure, leak-proof seal ✨Detachable Flip Straw Lid: Features a user-friendly flip straw lid for quick access to drinks, paired with a streamlined design that’s effortless to disassemble and clean ♻️Eco-Friendly Replacement: Reduce waste by replacing worn-out lids instead of buying a new tumbler. Upgrade your tumbler with our 40 oz Stanley lid replacement 😎Best thing for a Stanley: Seriously, this lid makes the Stanley Cup 100% more Stanley and way more stylish. It’s the perfect combo of practical and chic. If you're still living in the land of leaky bottles, upgrade your life with this one—you won’t regret it!

These lids fit 40oz Stanley Quencher perfectly and are truly leak proof.We have tested it out with Stanley and no water came out at all. The straw is easy to disassemble for washing but the plier it comes with to help with disassembling it is definitely necessary so don't lose it. The tops are really good, sturdy quality and the colors are exactly as they should look. Now you carry your Stanley around without worrying about spilling water everywhere.