Luigi Bormioli - Diamante - Made with Luigi Bormioli's latest innovation, SON.hyx. A classically brilliant design. That brings its clear cut elegance to any gathering. Beautifully bold shapes handcrafted with style. SON.hyx Crystal - Made with SON.hyx, a high-tech blown lead-free crystal glass that does not contain any heavy metals. 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.