Chill both the guava nectar and sparkling water in the refrigerator for at least an hour.
This ensures a refreshingly cool drink.
In a pitcher, combine guava nectar and lime juice.
Add the simple syrup for a touch of sweetness.
Stir the ingredients thoroughly until everything is well mixed.
This helps meld the flavors together.
Fill a glass with ice cubes.
Pour the mixture over the ice, leaving some space for sparkling water.
Top off each glass with sparkling water right before serving.
Garnish with lime slices and mint leaves for an added touch.