From Bittermilk:

Not your typical tonic, the No.5 combines lime and lemon juice with cinchona bark, the source of quinine for tonic. We peel fresh grapefruits and char the skins to help bring out bitter yet refreshing notes. Just a bit of local Bulls Bay Saltworks sea salt helps pull savory caramel notes and rounds out flavor. Works well with any light spirit. Build over ice equal parts No.5 vodka soda water in a tall glass. Garnish with a lime wedge.

• 17 fl oz
• Ingredients - Fresh Lime and Lemon Juices, Florida Golden Cane Sugar, Charred Grapefruit Peel, Cinchona Bark, Spices, Bulls Bay Sea Salt