Peugeot 250034 Les Impitoyables Glass Number Four for Sparkling Wines Tube contains one glass Les Impitoyables glasses intensify the characteristics of wine by enhancing their qualities or bringing out the slightest flaw Number 4 glasses are intended for use with Champagne or sparkling wine A pointed cone at the base of the bowl causes bubbles to form a column, which encourages aeration. The inside walls have a diamond pattern coating which catches the mousse (and gives a good indication of a wines maturity)