Introducing Riedel Performance; the new ultimate loudspeaker for fine wine. With three generations of research, development and experience in creating functional, grape varietal specific glassware, Georg and Maximilian Riedel challenged themselves to improve on what had gone before. The result is Performance – a technologically advanced and user-friendly collection of grape varietal specific glasses. Performance is the first Riedel wine glass series ever to feature bowls with a light optic impact. The optic waves on the inside of the glass help to break open the wine and aerate it as it is swirled. This decanter holds a magnum of wine. Red and white wines and champagnes may be decanted before serving.