'O' (2004) is the first varietal specific wine tumbler in history. 'O' is an innovative take on the casual wine glass for total wine enjoyment. 'O' is based on the benchmark shapes of RIEDEL VINUM to enhance the world's most important grape varietals. Broken stems are a thing of the past. In short, 'O' is the ideal glass for everyday use and for every occasion. It is fun, feels good to hold, looks trendy and it works! Machine blown in Austria.