The inaugural issue of Tonic regales lost tales from legendary drinkers. Our man in Champagne visits the secret cellar of billionaire rapper Jay Z. On Germany’s Cold War frontier we drink unpasteurised beers unchanged since 1945. And in Iceland we meet modern Vikings fuelling a revolution in brennivín, a potato liqueur laced with moss, rhubarb and meadowsweet, a fragrant herb found in glacial riversides.