Taste variations among club soda, seltzer, and sparkling and tonic waters are generally on account of differing kinds and quantities of minerals. Tonic water also contains quinine and sugar. Quinine: copyright Dry Tonic Water has quinine, a bitter compound that is certainly derived with the bark with the cinchona tree. https://blndwater.com/products/blnd-lemon-and-mint-tonic-water-250ml