If 3/4 of your drink is the mixer, mix with the best By blending subtle botanicals flavours with spring water and quinine of the highest quality from the fever trees of the Democratic Republic of the Congo, Fever-Tree have created a delicious tonic water with a uniquely refreshing taste and aroma. Designed to enhance the very best gins, vodkas and fortified wines, like vermouth, fino sherry and white port. Made with natural quinine. No artificial sweeteners, flavourings or preservatives.