In tropical British colonies gin was used to mask the bitter flavour of quinine, which was the only effective anti-malarial compound. Quinine was dissolved in carbonated water to form tonic water; the resulting cocktail is gin and tonic, although modern tonic water contains only a trace of quinine as a flavouring. Gin is a common base spirit for many mixed drinks, including the martini. Secretly produced "bathtub gin" was available in the speakeasies and "blind pigs" of Prohibition-era America as a result of the relatively simple production.
In tropical British colonies gin was used to mask the bitter flavour of quinine which was the only effective anti-malarial compound. Quinine was dissolved in carbonated water to form tonic water; the resulting cocktail is gin and tonic, although modern tonic water contains only a trace of quinine as a flavouring. Gin is a common base spirit for many mixed drinks, including the martini. Secretly produced "bathtub gin" was available in the speakeasies and "blind pigs" of Prohibition-era America as a result of the ,relatively simple production.