Moscow Mule
50 ml Vodka, 120 ml Ginger beer, 15 ml Lime juice, 1 Lime wedge
The copper mug
The cold, heavy, metal-handed glass a Moscow Mule is built in.
About 350 ml
2 cocktails here
Where it comes from
The Moscow Mule is dated to about 1941 and credited to John G. Martin of Smirnoff and Jack Morgan of the Cock 'n' Bull in Los Angeles - with the bar's own bartender, Wes Price, also claiming the drink, so the tidy two-men-and-a-promotion story is not settled. What is documented is the marketing: photographs from 1947 of Martin, Smirnoff bottles and mugs of copper.
Copper conducts heat well, and that is the whole trick rather than a magic one. The mug goes cold in the hand within a minute of the drink going into it; it does not keep the drink colder than anything else would for long, it simply feels as though it does, which is most of what a drink is for.
What to look for
Heavy, with a thick handle that will not numb your fingers, and a mouth wide enough for the ice you use.
Served in a copper mug
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Ginger Mule
150 ml Ginger beer, 20 ml Lime juice, 10 ml Simple syrup, 1 Mint sprig, 1 Lime wedge