American · Tito's
Tito's is made from corn rather than wheat or potato, and distilled in pot stills in Austin, Texas. Corn leaves a faint sweetness that wheat vodka does not have.

Photo: Denys Gromov / Pexels
The one thing that matters
In a mule that sweetness is useful. It softens the bite of the ginger beer without adding sugar, so the drink lands balanced with nothing but three ingredients.
It is the most common choice in America and it works well. The corn base leaves a touch of sweetness that takes the edge off sharp ginger beer.
A little. Copper conducts heat fast, so the mug goes cold almost immediately and your hand keeps feeling it. It does not change the flavour, but a colder drink tastes sharper.