It used to be that a good gin and tonic merely meant one made with premium liquor. Not anymore. This year, artisanal tonic waters from Fever-Tree, Stirrings, and Q Tonic debuted at upscale cocktail joints and BevMo! Highfalutin ingredients included triple-purified water, African marigolds, and organic agave. At the same time, DIY mixologists began making their own tonic water. Could Schweppes and Canada Dry be at risk of being eighty-sixed from the bar?