These Duralex Unie Hiball Tumblers are part of an extensive collection of iconic, modern and classic designs of tough, tempered glassware for the bar and table - all you need for the busy drinks service environment. All Duralex products are tempered glass, making them extremely durable and resistant to breakage and thermal shock, resisting temperatures of up to 130 C - this means that all items can be used for hot beverages