Riedel Extreme Prosecco Superiore Glasses: Serving wine in the optimal glass enhances the aromas and experiences of the wine. While in Italy, I (Brittani) fell in love with Prosecco. Enjoying Prosecco in this tulip shaped glass is like kissing a unicorn…it just feels right. The tulip shape of the glass focuses the aromatic notes up towards the nose. This glass has tiny etchings in the bottom of the glass, called nucleation points. Bubbles are formed when the carbon dioxide in the wine reacts with an irritation point, in this case a nucleation point, on the surface of the glass. The carbon dioxide forms a bubble and then rises upwards in the glass. The nucleation points etched in the glass give the carbon dioxide a directed place to escape from. This can help preserve carbonation.