18-8 Stainless Steel dual wall construction Copper-lined, vacuum-insulated deep draw liner maintains optimal 7X drinking temperatures Lead-free vacuum seal Dual function tumbler and 12 oz slim can cooler Features thumb-slide, screw-on lid to prevent spills and maintain drink temperatures longer Twist top rubberized ring designed to hold 12 oz slim cans Both lids attach to the body of the unit at the same time. This ensures no pieces are lost for a seamless on-the-spot transition Sweat-free design Durable powder-coated finish 1-year limited warranty Patented