Why Choose Our Moscow Mule Mugs?. Enjoy the Authentic Moscow Mule Experience – Ice Cold & Full of Flavor. Set: Copper Mugs (16 oz). 🍹 Versatile for Any Drink: Not just for mules! 🛠️ Straight Plain Pure Copper – Crafted from premium 100% copper (no lining), with a beautiful Plain finish and solid welded handles.