Fevertree Drinks plc, known as Fever-Tree, is a British producer of premium drink mixers, founded by Charles Rolls and Tim Warrillow in 2004. The company's name comes from its initial product, a tonic water. Their tonic was flavoured with quinine, a chemical extracted from the bark of the South American cinchona tree. When introduced to India as a pharmaceutical to aid in reducing the fever associated with malaria, quinine was blended with soda water and sugar to make it more palatable, producing the earliest tonic water. The cinchona tree was referred to in India as fever tree.