For anons. Tonic water contains quinine. And it so happens there is a bottler who calls their offering "Q".

Brooklyn, NY (March 20, 2017) – Q Drinks, a line of spectacular carbonated mixers founded by entrepreneur and gin & tonic enthusiast, Jordan Silbert, will introduce Q Indian Tonic Water as the newest offering in its line of spectacular cocktail mixers. Q Indian Tonic Water is from the original Q Tonic Water in that it is purpose-built to perfectly complement juniper-forward London Dry gins. Along with this introduction, Q Drinks has refreshed its packaging for the full range, which includes Tonic Water, Club Soda, Kola, Ginger Beer, Ginger Ale, Grapefruit Soda, and now Indian Tonic Water, giving each its own unique personality and signifying colors. Q Indian Tonic Water officially launches today at www.QDrinks.com, and will roll out in markets across the country over the next couple of months

https://www.bevnet.com/news/2017/q-drinks-adds-q-indian-tonic-portfolio-spectacular-mixers