In the 1940s vodka became introduced to the mainstream by way of the Moscow Mule, traditionally served in copper mugs just like these. * Smirnoff was the choice spirit for this popular drink, and by the 1950s vodka was the best selling liquor in America. * This replica is 100% copper and is available with or without a Moscow Mule graphic embossed. * It holds 18 ounces. * Built for those that want to experience authenticity, expand their collection, or add decorative accents to their bar.