Instructions (Blueberry Simple Syrup):

Combine blueberries, water and sugar together in a small saucepan and bring to a boil. Reduce to a simmer and cook for 5 minutes. Mash the blueberries with a potato masher and allow to cool for 30 minutes, then strain.

Instructions (Cocktail):

Fill a shaker halfway with ice. Then add the gin, grenadine, blueberry simple syrup, lime juice and luster dust. Stir for 30 seconds, then pour into a glass. Top with kombucha.