1½ oz Round Barn's Red Sky Rum
2 lime wedges
3 oz. watermelon juice
6 mint leaves
½ oz simple syrup
Soda water
Take one lime wedge and muddle it in the bottle of a cocktail shaker.
Fill a shaker with ice.
Add all ingredients (except the soda water) to the shaker.
Shake the ingredients and pour them into a pint glass.
Top the glass with a splash of soda water.
Garnish with a lime wedge.