Sparkling low calorie elderflower flavour soft drink with quinine with sweeteners. Try out Schweppes Slimline Elderflower Tonic Water, a carbonated soft drink with quinine and elderflower taste. Enjoy classic, crisp tonic water with an aromatic hint of elderflower while at a party or relaxing at home. Drink it straight or mix it with your favourite spirit to make your own tasty cocktail.