Combine one 12-ounce can thawed frozen pineapple-orange juice concentrate, 1 cup coconut water and 3 thin slices ginger in a medium skillet; cook over medium-high heat until syrupy, about 20 minutes. Stir in 1/2 teaspoon coconut extract; let cool. Add seltzer.
For each drink, combine 2 to 4 tablespoons flavored syrup with 1 cup cold seltzer in an ice-filled glass.
Photograph by Charles Masters
Courtesy of Food Network Magazine