Tonic water is a carbonated drink that includes quinine as a major ingredient. Quinine has been used for its medicinal properties to treat malaria and other diseases. Quinine in tonic water tastes bitter and was used earlier as a palatable way to consume quinine medicine. Recently tonic water has gained popularity as a drink mixer in gin and vodka-based alcoholic drinks. Direct consumption of tonic for bitter flavor has also been a key driver driving the growth of tonic water market.