Sabrage

Sabrage ʒ is a technique for opening a Champagne bottle with a saber, used for ceremonial occasions. The saber is slid along the body of the bottle to break the entire neck away from the bottle, leaving only the base of the bottle open and ready to pour. The force of the blunt side of the blade hitting the lip breaks the glass to separate the col...
Found on http://en.wikipedia.org/wiki/Sabrage
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