C & B's Old Fashioned Quinine Original Tonic Syrup. Natural quinine from Peruvian cinchona bark. Fresh citrus, spices, and a hint of lemongrass. Organic blue agave nectar adds just a touch of sweetness. A classic mixer for gin or vodka. Tonic Water, Gin And Tonic, Gin Mixers, Tonic Syrup, Agave Nectar, Packaging Design, Product Packaging, Cooking Utensils, Williams Sonoma