Ingredients:

3-4 oz. grapefruitbubly™
½  oz. fresh grapefruit juice
sprinkle of ground cardamom
4 fresh blackberries
½  oz. lychee syrup
lychee, garnish
 

How to make it:

1. Muddle blackberries, and lychee syrup in the bottom of a mixing tin.
2. Add ice, sprig of cardamom, and grapefruit juice. 
3. Shake until well chilled. 
4. Double strain into a rocks glass filled with ice. 
5. Top with grapefruitbubly™. 
6. Garnish and serve.