One of Riedel's most popular stems, these Vinum Bordeaux wine glasses are designed to enhance the flavors of full-bodied red wines with high levels of tannin, such as Bordeaux, Cabernet Franc, Cabernet Sauvignon, Merlot, Rioja and Tempranillo. Introduced in 1986, the Riedel Vinum line was the first machine-made series of glasses in history to be based exclusively on the characteristics of grape varietals. The Vinum series has had a strong and permanent impact on the wine glass culture around the globe. These glasses have proven to consumers and restauranteurs that the pleasure of consuming wines starts with the glass. Developed by 10th generation Georg Riedel on the principle that the contents commands the shape, Vinum is great for everyday use. These glasses are made with over 24% lead crystal.