It is most commonly consumed mixed with tonic water. It may also be drunk on ice or with tonic water. The quinine in tonic water will fluoresce under ultraviolet light. A tonic cocktail is a cocktail that contains tonic syrup or tonic water. The quinine was drunk in tonic water, however the bitter taste was unpleasant. Quinine is a flavor component of tonic water and bitter lemon drink mixers. The company's name comes from its initial product, a tonic water. Quinine is also the ingredient in tonic water that gives it its bitter taste. As it has an intense taste, it is used for making tonic water. Quinine is also known for its bitter taste and is found in tonic water. The first commercial tonic water was produced in 1858. Sweet white port and tonic water is a commonly consumed drink in the Porto region. In addition to soft drinks, they produce the traditional mixers club soda and tonic water. Popular mixers are cola, tonic water and lemonade, with the latter probably the most popular. Medicinal tonic water originally contained only carbonated water and a large amount of quinine.