Deep cuts in the base of the glass to enhance the shine of Luxion?, a success story that has been among the 5 best-selling lines of RCR collections for more than 20 years. Ultra-clear-The most transparent Crystal Glass Durable-Extremely resistant to breakage Lightness-A unique lightness given by pure raw materials Acoustic-Clear and vibrant crystal-like sounds Eco-Crystal-100% recyclable. Produced with respect for the environment.