Perhaps skip that in-flight negroni.You’ve had a good year. You and your significant other are about to board that long-haul flight to your well-deserved salmon-fishing vacation in Scotland, where you’ll be pampered just like King Charles in a real Scottish castle — with its own river, no less. Your wellies, your waders, and your fishing kit are on the plane. Next stop, Edinburgh and on to the wild Highlands. In the lounge with time to kill, you two decide to toast embarking on this adventure by ordering up a round of delicious Johnnie Walker Black on ice. Scotland, right? A...