Old Dutch 2-Ply Hammered Stemless Wine Glasses (Set of 2), Solid Copper/Stainless Steel, 17 Oz. Set of Two 17 Oz. Stemless Wine Glasses Two-Ply technology: A layer of Solid Copper bonded with a layer of 18/8 Stainless Steel. Get the cooling benefits of Copper with the durability of Stainless Steel. These made-to-last wine glasses feature a coating of resilient lacquer, that resists tarnishing, for lasting appeal. Use them not only for wine, but also for juice and frozen drinks Durable and shatterproof, they're perfect for the bar, and the outdoors!