Hey! Ally Love here. As Contigo’s Chief Hydration Officer, I’m thrilled to offer you a tumbler that does it all, and in style—just like you do. The Contigo Streeterville 2.0 features an AUTOCLOSE Lid that seals automatically when you remove the flex straw, so you can safely sip, stow, and go. A double-insulated stainless steel wall keeps drinks cold for up to 20 hours, helping you stay cool while you sweat through your day. A nonslip-grip base prevents slipping or scratching on surfaces, whether your desk or your treadmill control console. The tumbler's sophisticated design is available in bold colours, and, to make cleanup easy and convenient, the tumbler's lid and reusable straw are dishwasher-safe and BPA-free. Hope you love it as much as I do!