These stemless wine glasses are made of Sparx break-resistant glass. Luigi Bormioli proprietary Sparkx glassware formula results in a glass that is both ultra-clear and durable. These machine blown glasses are lead-free, have laser cut rims, and maintain their clarity for up to 2000 industrial dishwashing cycles. Elegant yet affordable, Michelangelo 16 oz. Stemless Wine Glass is perfect for any occasion.