Made with Luigi Bormioli's latest innovation, SON.hyx. SON.hyx is a high-tech blown lead-free crystal glass that does not contain any heavy metals. This glass present outstanding chemical, optical and mechanical properties. It is strong with a higher resistance of the rim, a higher resistance to impacts, and a higher resistance to twisting the stems. To make it even stronger, the glass was reinforced with titanium. The permanent anti abrasion treatment on the glass’ stems hardens the glass surface increasing its resistance to abrasions, which are responsible for the fragility of the stems during daily usage. Ultra Durable: Improved with a permanent anti-abrasion treatment applied directly to the glass’ stems to increase resistance to breakages. Dishwasher Safe: Fully resistant to washing cycles. The high quality means the glass won't alter in transparency and brilliance. Good for the Planet: Good for the planet and yourself This product is made of glass. Luigi Bormioli: the d