Jeremiah Schenzel at the Cocktail Club in Charleston, SC offered up this recipe for the cocktail served at the Field Guide launch event last week at Blue Bicycle Books. It's a perfect sipper to accompany some armchair traveling. 

What the Doctor Ordered 

1 ½ ounces Silver Rum
¼  ounce grapefruit juice
¼ ounce lime juice
¼ ounce pineapple juice
1 tablespoon brown sugar
Float of Blueberry Cheerwine Grenadine
Blueberries as needed

Combine all ingredients except grenadine into a shaker with ice. Shake and double strain over a large ice cube. Top with a float of the Blueberry Cheerwine Grenadine. Garnish with fresh blueberries.