Turna Copper Vino Wine Glass No. 2, Plain, 400 Ml, Nickel, Turna0457-2To prevent tarnishing, the exterior of our copper products is polished, while the interior is coated with tin using traditional methods. It is long lasting and durable. It does not rust. The visible and distinct lines on our products are due to each product being handcrafted individually; therefore, the lines on each product are unique. Our copper products are not mass produced and are 100% handmade. *Height: 19 *Thickness: 0. 8 mm Weight (gr): 270