Schott Zwiesel Crystal Glass is made from a formula that replaces lead with zirconium and titanium for brilliance and strength. Schott Zwiesel Crystal Glass is unrivaled for the elegance of its design yet it is dishwasher safe. With a wide bowl for aeration and a narrow opening to keep aromas within the glass, coupled with an updated silhouette, Sensa eschews stuffy tastings for more casual shared experiences.