The definition of an entrepreneur means your balloon is always full. When your balloon is full, we need a place for the air to go or the balloon will pop. When given an opportunity to do so, we will use any chance to let air out of the balloon.
A split. The smallest bottle size of champagne is called a Quarter holding 18.75cls.
You don't want people drinking bad Champagne and spitting it out in disgust! That does not look good on photos of the event :) So if you figure 5 ounces per person for the toast drink, a bottle of Champagne holds 750ml. 750ml is just over 25 ounces. So that is just about exact five glasses of Champagne in a given bottle. Remember, that is just enough for the toast itself.