Premium Indian Tonic Water. If 3/4 of your drink is the mixer, mix with the best. A crisp & fresh tonic water crafted by blending spring water with subtle botanical flavours and quinine from the fever trees of East & Central Africa. Fever-Tree Premium Indian Tonic Water contains absolutely no artificial flavours or sweeteners. It pairs perfectly with gins, premium vodkas and vermouths. For the perfect drink simply mix: 50ml spirit, 150ml Fever-Tree Mixer, garnish & stir. Fever-Tree is proud to be voted no.1 bestselling and top trending mixer by the world’s best bars (Drinks International Awards 2025).