Elunda Basson from Pongracz explains the use of the Bubbly Glass

From Winston Churchill to Napoleon Bonaparte to Mark Twain, everyone who was anyone in history seemed to have something to say about the wonders of bubbly. Designed by the storied French porcelain house Sèvres, the cup, which was supposedly modeled after Marie Antoinette's own breast. Initially, the flute was tall, conical, and slender.[4] By the 20th century, however, the shape preferred by glassware purchasers had changed from a straight-sided glass to one which curved inward slightly near the lip. Elunda explains the difference.