Canyon Coolers heralds from Arizona "The Copper State" so it only made sense to make our unique 100% copper plated tumblers. These Canyon tumblers are Vacuum insulated to keep your beverage ice cold all day, or piping hot for half the day. The sturdy stainless steel interior won't react with acidic drinks and the double wall construction with a copper plated exterior is high performance and sweat free. The black molded in slider looks great on the amber smoke lid with rubberized gasket and it keeps your beverage in the cup where it belongs. The lid even accommodates your favorite straw. *Due to the Copper plating, our tumblers are hand wash only.