It would be the easiest route to take, but you can also use a mason jar. You want to combine all of the ingredients (except for the ginger beer) with ice in the cocktail shaker or jar. This will chill the drink, as well and water it down just a touch so that it's perfect to drink. Just don't make the mistake of adding the ginger beer to the shaker or jar! You will end up with a gigantic mess. Just top each drink with ginger beer later.