I've always wondered why wine and champagne makers create those magnum bottles, now I know:to fill the world's largest champagne flute (16.5 liters or 4.4 gallons), of course!
The glass was 203 cm tall and with a diameter of 46 cm (80 x 18 inches)! It took 11 magnum bottles (16,5 litres) to fill this huge cup; filled with spumante Asti DOGG of course.
11 magnum bottles ... they should've used just one Melchior bottle!
Link - Thanks Gianluca!