Human: What is the difference between a gin and a gin and tonic? Assistant: 
The main difference between a gin and a gin and tonic is that the gin and tonic combination typically contains tonic water, which has quinine in it. This gives the drink a bitter flavor and makes it more refreshing. Gin is typically made from juniper berries, coriander seeds, and other spices, while tonic water is usually flavored with quinine.