Step one

Divide the sugar between 2 tall Collins glasses. 

Step two

Squeeze 1 lime half into each glass

Step three

Add a mint sprig to each glass and muddle together with a long spoon.

Step four

Add a splash of soda to each glass and muddle further. 

Step five

Divide the rum between the glasses, add 4-5 ice cubes to each glass and stir. 

Step six

Add a dash of bitters to each glass.

Step seven

Top with soda and garnish with mint leaves.