The magic of this glass is its ability to highlight the full spectrum of aromas and flavors offered by fine champagnes and sparkling wines while preserving their elegant effervescence. Bubbles pose a challenge. How do you keep the sparkle in sparkling wineThe solution lies at the bottom of each Vinum Prestige Cuve Flute. Etched into each is a small dot, the purpose of which is to provide a slightly abraded surface that serves to generate a continuous stream of bubbles and prevent the champagne from going flat in the glass. Designed to highlight the bouquet of champagne, this light and well-balanced glass accentuates the complexity and richness of vintage champagnes and prestige cuves.Vinum is made of lead crystal, machine blown in Bavaria, Germany. The enjoyment of fine wines starts with the right gl. Vinum is made of lead crystal, machine blown in Bavaria, Germany. Riedels scale, g variety-specific, dishwasher safe, Vinum (1986) is the first g variety-specific machine gl series in history.