Wine glasses from Riedel of Austria are often referred to as the "Rolex of glassware". Riedel's latest innovation is the O Series, easy-to-hold, hard-to-tip, stemless wine tumblers. The compact spirits tumbler s designed to bring out the flavors and aromas of port, cognac and other spirits. It measures a mere 3.5" tall , with a capacity of just over 8 ozs.O Series glasses fit your hand, and go in the dishwasher or the picnic basket with equal aplomb. In the Riedel tradition, and unlike imitation tumblers, the shape, size, type of rim, even the glass thickness, is carefully chosen to enhance the flavors of particular varietals.