Double-walled and vacuum insulated to ensure your coffee is always at the right temperature. It keeps your cold brew or iced coffee cold for up to 12 hours and hot coffee warm for 9 hours, to keep you caffeinated and energized all-day long! The bottom of the cup is conveniently sized to fit car cup holders for easy portability. Fill your insulated mug with coffee, sweet tea, ice water, milkshakes, juice, cocktail, lemonade and more!