That's why we tested and ranked 16 types of Fever-Tree mixers. The best of the bunch, the Elderflower Tonic Water, is not only the brand's top mixer, but it also makes for an excellent gin and tonic.

And while it's not the most common drink on coffee shop menus in the U.S., an espresso tonic may ... on the market.

Its product portfolio includes Indian tonic water, Mediterranean tonic water, Elderflower tonic water, Aromatic tonic water, Clementine tonic water, Lemon tonic water, Ginger beer, Ginger ale ...