Hydrating has never been easier with our 40 oz. travel mug! Tenistic Travel Mug is made of 18/8 SS liner with copper coating vacuum sealed can keep drinks hot for 12 hours and cold for 30 hours. High sealing lid design will surely bring you a surprise with its leak-proof and spill-proof, and comes with PP straw and handle for sipping your favorite beverages at home or on-the-go. Perfect for office, travel, camping, and party. BPA FREE, FDA certified