During the 19th century,
champagne glasses were wide and shallow, not at all like the flutes
we use today. They were called 'coupes' and legend has it that they
were modeled after the shape of Marie Antoinette's left breast.
The coupe eventually gave way to the 'flute', the tall, narrow
glasses out of which most of us currently our bubbly. The flute both
displays and preserves champagne bubbles, and makes it easier to
drink.
Many champagne lovers say the 'tulip' is the true way to enjoy the
beverage. The glass is tall, but curves outward to within a couple
inches from the mouth, then curves inward to the mouth. This design
allows a little more space for swirling, and focuses the aromatics.