Pontoon craft their cocktails in London, using great ingredients that let you focus on enjoying the cocktail rather than making it. Their Widow's Kiss, which was invented by George Kappeler in 1895, is made with Château du Brueil Calvados, Green Chartreuse, Bénédictine and Angostura Bitters.
For the perfect serve, pour 1/5th of the flask over ice, stir, strain and serve with an orange twist in a cocktail glass.