Fever Tree Elderflower Tonic Water is made using naturally sourced quinine from the bark of the fever tree in the Congo, blended with spring water, natural cane sugar and Tanzanian bitter orange, much like their Premium Indian Tonic Water. The Elderflower Tonic adds fresh elderflower extract to bring a floral summery flavour to your G&T. The elderflowers are sourced from a Gloucestershire farm where the flowers are processed within hours of hand-picking to retain their full flavour. Importantly, no preservatives or artificial ingredients are ever used in any of Fever-Tree's products. If three quarters of your Gin & Tonic is tonic, then you should be using the best tonic. This is the attitude Fever-Tree brought to the craft of their original Indian Tonic Water and a standard they continue to apply across their range.