Perfect for sipping, drinking, or gulping down your favorite beverages. This travel mug holds 40 ounces and stays cold for up to 11 hours and hot for up to 7 hours with its copper lining and insulated double wall stainless steel. Each mug is strong and durable, from its handle to a convenient screw-on clear straw lid with a twist closure, giving you the option of drinking with or without the included removable straw.