Every aspect in the design of the Zalto line has been made in the pursuit of creating the finest wine glass available. The curve of the bowl of each glass, carafe, and decanter in the Zalto line are tilted at 24, 48 and 72 degrees, which corresponds to the tilt angles of the Earth. As the ancient Romans believed, this triumvirate of angles, when used in vessels for food and drink, not only kept its contents fresher but also improved the taste. Further, the width of the decanter at the point of the curve is such that it allows for the greatest amount of surface space desired for the type of wine it is intended. A good swirl can be given at that point, and the shape then funnels the bouquet to the nose as it decants it perfectly into the glass. All Zalto glassware is lead-free and dishwasher safe. With Zalto decanters and carafes, you can also hand wash them with care.