According to professionals, Champagne is best enjoyed in a tulip glass, tall enough to allow the bubbles and aromas to develop to the full. When Champagne has complexity, depth and autolytic notes, then the best option is to use a white wine glass to let the aromas express themselves better.
Yes, Marilyn Monroe, Elisabeth Taylor, Humphrey Bogart and even James Bond had it wrong! A Coupe as a Flute is always a lousy marriage: the right liquid in the wrong vessel. Through they possess a certain retro chic and are « de rigueur »for a classic champagne fountain, the Coupe allow both fizz and fragrance to dissipate to quickly when the Flute concentrates carbon dioxide at the top of the glass. With a straight narrow glass, while it’s good for bubbles and keep the temperature low, it is hopeless on the nose.
Use a Coupe for cocktails, enjoy a sparkling wine in a Flute, drink Champagne in a Tulip glass but drink it around 64°F (18°C) to maintain the bubbles longer!