Everyone's been knocked about by having a couple too many of these bad boys! The strength of the cocktail all depends on the size of the glass you are using but I would recommend the 2.5 shots as listed.
Try mixing both lemon and lime juice instead with a splash of sugar syrup! The cola should have plenty of sugar already...
15-20mL Lemon Juice
Fill your hi-ball glass with ice
Add all the ingredients with the lemon juice last
Garnish with a piece of lemon
Find more cocktail recipes at StevetheBartender.com.au