Refrigerate or freeze a coupe or old-fashioned glass for at least 5 minutes. Place 1/2 fresh rosemary sprig, 1 1/2 ounces lemon juice, 1 1/2 ounces simple syrup, 1 ounce Campari, and 1 large egg ...

At the end of the day, those $100 bottles are really better off for neat drinking, and using them in a cocktail like the old fashioned simply comes off as ostentatious.