Sommeliers Rheingau / Riesling 86cl, 1-pack from Riedel. Riedel's most classic and exclusive series is called Sommeliers. The series was launched in 1973 and was the world's first grape-specific wine glass series. Sommeliers were created with the intention of enhancing the aromas and flavors of specific grapes, which has never been done before. The Sommeliers series has won several awards and prizes for its good design. All 26 glasses in the Sommeliers series are mouth-blown and are available in water, alcohol and wine glasses in crystal. All glasses can be machine washed.