Ingredients: Served: On the rocks: poured over ice. Drinkware: Collins glass. Method: Pour all ingredients directly into highball glass filled with ice. Stir gently. Garnish. Add a dash of Angostura bitters. 4.5 cl (3 parts) gin, 3 cl (2 parts) freshly squeezed lemon juice, 1.5 cl (1 part) sugar syrup, 6 cl (4 parts) carbonated water