The Wide Mouth Flex Sip Lid brings a whole new level of convenience to your Hydro Flask. With a leakproof twist-to-open design, this lid allows you to safely transport hot beverages without worrying about spills. Just twist it open to take a sip, then twist it shut to lock it securely in place. Made from BPA-free materials, the Flex Sip Lid is both safe and durable, and it’s compatible with all Hydro Flask Wide Mouth bottles, so you can enjoy a seamless, on-the-go coffee experience every day.