Which soft drink contains the substance quinine?

Explanation

The substance quinine, C20H24N2O2, is a natural, white crystalline alkaloid extracted from cinchona bark. It was used to treat malaria, especially before the advent of newer treatments. Today, the substance is used almost exclusively for nocturnal leg cramps. Quinine was extracted from the bark of the South American cinchona tree.
The substance is used as a flavoring agent in tonic water. According to tradition, the bitter taste of the antimalarial quinine drink led British colonialists to mix it with gin, giving birth to the well-known cocktail gin and tonic.