The Luxe Insulated Stainless Steel Travel Tumbler, 18 oz, features a fully sealed lid and straw to prevent spills and is insulated to keep drinks cold up to 18 hours. SEAL IT IN: Insulated tumbler with fully sealed lid and straw for mess-free drinking on the go NO SPILLS: Straw has an inner valve to ensure liquids won't spill even if tumbler is accidentally tipped or dropped FOR THE LONG HAUL: Double-wall vacuum insulation keeps drinks cold up to 18 hours SQUEAKY CLEAN: Lid comes off and straw twists apart for thorough cleaning EASY CLEANUP: Body, lid, and straw are top-rack dishwasher safe PERFECT FIT: Fits most cup holders PEACE OF MIND: All parts are BPA-free.