Q Drinks' website shows that they also make a "Kola", Tonic, and a variety of fruit flavors. It turns out that Q Drinks is owned by Schweppes, so they have a long history in the beverage industry.
According to their website, Q Drinks are "...clean, crisp, completely un-generic beverages that enhance the finest spirits and stand proudly on their own. We use the best ingredients we can find — organic agave from the Mexican countryside, quinine from the slopes of the Peruvian Andes, ginger from the fields of Southeast Asia, and salt from the Himalayas." Q Drinks also eschew "unpronounceable ingredients" and "high fructose corn syrup."