Moscow Mule Copper Mug - 100% Pure Copper 16oz - By Horse and Donkey Copper Co - Exceptional Design 100% PURE COPPER - The only way to enjoy a Moscow Mule is in a 100% Pure Copper Mug. NO LINING - Our mugs have no lining to ensure a completely authentic Moscow Mule experience. ELEGANT DESIGN - 16 ounces ensures the superb balance of ingredients when mixing your Moscow Mule. SATISFACTION GUARANTEED - 100% satisfaction guaranteed. No hassle returns.