The Pinot Noir/Nebbiolo glass is perfect for light-bodied red wines with high acidity and moderate tannin. This glass highlights the rich fruit-forward characters and tempers the high acidity of the wine. The balloon-shaped bowl captures all the nuances of the wine's aroma. This product is made of clear crystal glass. Designed in 2004, RIEDEL The O Wine Tumbler was the first varietal-specific wine tumbler in history. O is an innovative take on the casual wine glass, based on the benchmark shapes of RIEDEL's Vinum series. Better yet, the O Tumbler fits into every dishwasher so broken stems are a thing of the past.