Build the following in a shaker:
1½ oz. Dos Artes Tequila Blanco
1 oz. blueberry liquor
½ oz. simple syrup
1 dropper of Calamansi Balsamic Vinegar
1 fresh lime, squeezed and put both halves in shaker
Shake and strain over fresh ice into a rocks glass. Garnish with blackberries or blueberries.