The Moscow mule is popularly served in a copper mug, which takes on the cold temperature of the liquid. Some public health advisories recommend copper mugs be plated with nickel or stainless steel on the inside and the lip, but it has been disputed whether the time and acidity involved in the drinking of a Moscow mule would be enough to leach out the 30 milligrams of copper per liter needed to cause copper toxicity.
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45 ml | 1 1/2 oz | 9 parts | 1 jiggers
5 ml | 1/6 oz | 1 parts | 1/9 jiggers
120 ml | 4 oz | 24 parts | 2 2/3 jiggers
Garnish: Lime Slice
Drinkware: Copper Mug
Served: On the rocks; poured over ice