Schweppes Original Bitter Lemon Carbonated Lemon Soft Drink with Quinine with Sugar and Sweetener. - Prepare and Use: Schweppes Firedog Take a cocktail shaker and add a measure of premium vodka and another of raspberry liqueur. Squeeze the juice of half a lemon into the shaker, add a dash of sugar syrup and 50ml of raspberry purÃ©e. Shake vigorously. Pour the contents into a short glass half filled with crushed ice. Top up with Schweppes bitter lemon and dress with a spring of mint and 2 fresh raspberries.