Whether you're headed to the office, the farmers market or on a weekend excursion, the Hydro Flask Flex Sip lid provides the convenience you need, thanks to its leakproof design.  Leakproof lid allows easy sipping while moving throughout your day  Flex Strap makes your bottle (not included) easy to transport and comfortable to carry  Smooth-flowing opening is designed for hot liquids, but versatile enough for any drink  Easy to disassemble and clean; dishwasher-safe  BPA-, phlalate- and toxin-free  Covered by a Hydro Flask lifetime warranty