Prurex Stainless Steel Lid: The Premier Bottle Accessory Compatibility The Prurex Stainless Steel Lid is precisely engineered for bottles with a 2.28 - inch outer diameter (58mm), It's a seamless fit for 12 - 40 oz wide - mouth bottles from renowned brands like Hydro Flask, Takeya, Iron Flask, and Simple Modern. Before purchase, it's crucial to measure your bottle's outer diameter. Only a 2.28 - inch diameter ensures a proper, leak - proof seal. Note that it's not suitable for narrow - mouth bottles, Hydro Flask Growler, YETI, Nalgene, or TAL products. Durable Build Crafted from high - grade stainless steel, this lid outshines plastic counterparts prone to cracking. It withstands the bumps and drops of daily life, whether you're on - the - go, at the gym, or exploring outdoors, ensuring long - lasting use. Leak - Proof Its construction, combining stainless steel with a precision - made silicone gasket, guarantees a leak - proof seal. Toss your bottle in a backpack, place it in a cupholder, or carry it around, and you won't have to worry about spills. This not only safeguards your belongings but also preserves the freshness and temperature of your drinks. Effortless Portability Featuring an ergonomic, easy - to - grip handle, the lid makes carrying your bottle a breeze. Whether you're heading to the gym, commuting, or on an outdoor adventure, the handle offers a comfortable and secure hold, adding convenience to your daily routine. Exceptional After - Sales Service At Prurex, we're dedicated to your satisfaction. If you have any questions during the purchase process or after receiving your product, our professional customer service team is ready to assist