Start by making the mango puree. Blend fresh mango in a food processor until it becomes a smooth puree.
Take each cup and add 2 to 3 mint leaves along with a wedge of lemon and lime. Use a muddler to gently crush the citrus wedges and mint leaves to release their flavors.
Pour about 1/4 cup of mango puree into each cup, adjusting the amount according to your taste preferences.
Add 1 to 2 tablespoons of simple syrup to each cup, depending on how sweet you like your drink.
Fill the remainder of each cup with ice cubes and club soda.
Give it a good stir to blend all the flavors together, and voila! Your refreshing mango mint mocktail is ready to be enjoyed.