Schweppes, experts in tonic since 1783. The unique combination of quinine and bubbles and its recipe made with 100% natural ingredients make Schweppes ZERO Tonic the lightest and most refreshing drink. This tonic is the perfect balance between bitterness and sweetness. You already know its unparalleled taste. You'll be surprised how much it quenches your thirst. The Schweppes Zero range are sugar-free and calorie-free drinks. - Water, carbon dioxide, acidulant: citric acid, natural flavors, sweeteners: E-952, E-950, and E-954, quinine flavor.