The narrow base fits most car cup holders. ADVANCED LID CONSTRUCTION: Whether you prefer small sips or maximum thirst quenching, Stanley has developed an advanced FlowState lid, featuring a rotating cover with three positions: a straw opening designed to resist splashes with a seal that holds the reusable straw in place, a drink opening, and a full-cover top for added leak resistance. We’ve also included an ergonomic, comfort-grip handle, so you can easily carry your ice-cold water to work, meetings, the gym or trips out of town. EARTH-FRIENDLY DURABILITY: Constructed of 90% recycled BPA free stainless steel for sustainable sipping, the Stanley Quencher H2.0 has the durability to stand up to a lifetime of use. Eliminate the use of single-use plastic bottles and straws with a travel tumbler built with sustainability in mind. DISHWASHER SAFE: Cleaning your tumbler and lid couldn't be easier, just pop them into the dishwasher. Unlike plastic bottles that retain stains & smells, this metallic beauty comes out pristine