Complement your preferred vintage with the elegant, machine-made silhouettes of this pair of Riedel performance Riesling wine glasses. Performance is the first Riedel wine glass series ever to feature bowls with a light optic impact. Detailed research by the Riedel family, aimed at improving the organoleptic wine experience, revealed that increasing the inner surface area of the glass had a positive impact on the perception of the bouquet and flavor of the wine. The new bowl shapes in Performance, when combined with the optic effect, deliver ultimate wine enjoyment, making Performance the new essential 'must-have' wine glass collection for all wine-lovers.