Polara's Antica Ricetta Siciliana Tonic Water is a cool, thirst-quenching drink that owes its bitter aftertaste to quinine (a natural extract once given as a wonder drug). At the base of many cocktails (from the modern vodka & tonic and mojito to the more classic gin & tonic: three of the quintessential summer drinks), tonic water can also be enjoyed on its own as a refreshing and thirst-quenching drink. Serve with lemon zest and side dishes of olives, sun-dried tomatoes, pickles and pretzels, for example, for a deliciously refreshing aperitif.