A gin and tonic is a highball cocktail made with gin and tonic water poured over ice. It is usually garnished with a slice or wedge of lime. The amount of gin varies according to taste. Suggested ratios of gin to tonic are between 1:1 and 1:3. Gin & Tonic Recipe: 2 OUNCES GIN TONIC WATER TO TOP Add gin to a highball glass and fill with ice. Fill the glass with tonic water. Garnish with a lime wedge. Leave us some feedback, and share with your friends who need a refreshing drink on a hot American summer day! Music: Victory Gin by Computer Magic