Copper lined, vacuum-insulated liner maintains optimal 12X drinking temperatures. Dual walled Stainless Steel construction. Lead-free vacuum seal. Sturdy Stainless Steel handle. Features a push-on, AS plastic flip top with Tritan snap locking closure lid and straw hole. Includes one clear Tritan straw. Durable powder-coated finish with a Stainless Steel top rim. Sweat-free design.