With its beautiful shape, the Pisa Decanter ensures that the wine is well aerated when being poured, guaranteeing perfect aeration. The generous surface area of the decanter means that the wine has plenty of space to breathe. Thanks to these two components – aeration and breathing surface – the wine’s full taste is able to unfold. German glass maker, Spiegelau, is the world's oldest glass maker and in their attainment of the best and most unique wine glass, they developed the Platinum Glass Process. They use 200 kilogram Platinum in their production to make a beautiful, incredibly solid yet light-weight glass. An independent laboratory has certified Spiegelau stemware as "extremely dishwasher safe." After undergoing 1500 dishwasher cycles, they found no loss of brilliance or makings. The glass rim is straight edged instead of a rolled edge which does not interfere with the wine as it rolls onto the palette. It was important to HomeWerks that these are Lead Free, adhering to the CA Proposition 65 Warning against exposure to lead. We think you'll agree...the makings of a great wine glass.