This Tumbler brings a touch of sophistication to every sip. Designed with a striking optical effect, this machine-made glass beautifully refracts light, elevating any table setting, whether you're enjoying water, cocktails, or your favorite juice. Its ergonomic shape ensures comfort with every use, while the durable, all-purpose design makes it perfect for both everyday moments and special occasions. A true blend of form and function, this Tumbler is an essential for anyone who appreciates refined glassware. 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.