Contrary to popular belief, cognac isn’t just for older men who want to order a digestif. It’s also perfectly suited to cocktails—in fact, it was once one of the most popular spirits used by bartenders before the arrival of phylloxera, a nasty aphid that ravaged estates around the world in the early 1870s. For a light aperitif, sip it like the Cognacians: with a tonic or ginger ale. It’s a nice change from the classic Spritz ! Baptiste Loiseau, cellar master at Rémy Martin, which is also celebrating its 300th anniversary, explains how to enjoy it…