In a cocktail shaker with ice, combine syrup, bitters and lime juice, then shake. Add sparkling water to shaker, then immediately pour into a glass. Express lime peel over drink, then garnish with it.
In a cocktail shaker with ice, combine syrup, bitters and lime juice, then shake. Add sparkling water to shaker, then immediately pour into a glass. Express lime peel over drink, then garnish with it.