Measure the ingredients accurately using the Jigger.
Shake everything in a shaker with ice — for at least 10-15 seconds.
Strain through the cocktail strainer into the pre-chilled glasses, the ice cubes remain in the shaker.
If you want to, you can serve the drink with lime zest, but it’s not a must.
Notes
Tip: The quality of the cocktail depends on the quality of the rum, the acidity of the limes, and the sweetness of the sugar syrup. It definitely applies here: Do not save at the wrong end!