Designed for Thrive Flip Straw: Fits all CamelBak Thrive Flip Straw bottle sizes, ensuring seamless integration with your existing bottles Flip and Sip: Designed for easy, streamlined hydration with a simple flip mechanism Effortless Hydration: Provides a convenient way to stay hydrated without any hassle Durable Design: Made from high-quality materials to withstand daily use and harsh conditions Leak-Proof: Engineered to prevent leaks, so you can drink confidently without worrying about spills