What could be more refreshing on a hot day than a cold cocktail? Mixed drinks can include anything from fruit juices to soda water to hard liquor. Today, we’ll be focusing on cocktails that include tonic water.

Tonic water is a carbonated drink that is often used as a mixer with liquor. It is made with carbonated water, quinine, and sugar or artificial sweeteners. Quinine is a natural compound that is found in the bark of the cinchona tree. It …