KnowraTonic waterLinked fromLinked fromThe 4 pages that link to Tonic water, each with the reason it gives.All 4Broader topic 1Related 1Compared with 2QuinineRelated: Quinine gives tonic water its defining bitterness at regulated concentrations.Carbonated waterCompared with: Unlike plain carbonated water, it contains quinine and typically sugar or another sweetener.Gin and tonicBroader topic: Its sweetness, bubbles, and quinine bitterness define the drink’s other main component.Ginger aleCompared with: Its bitter quinine flavor distinguishes it from ginger ale’s spicy sweetness.