Blackberry Mojito

1.5 oz White Rum
.5 oz Collins Blackberry Liqueur
4 Blackberries
Sprig of Mint
.5 oz Fresh Lime Juice
.5 oz Simple Syrup
Soda Water

Muddle blackberries and mint in shaker, add Rum, Collins Blackberry, lime juice, add ice and shake. Empty contents into highball glass and top with approximately 3 oz of soda water