Endeavor Stackable Rock Glass 207mlWith their distinctive internal ring design and stable base, the endeavour range of tumblers presents cooler, beverage, and highball glassware. The heavyweight base tapering to a fine rim is covered by Libbey’s DuraTuff ® guarantee for durability. Libbey’s DuraTuff treated glassware is designed to strengthen the upper portion of the glass, increasing its resistance to thermal and mechanical shock. The ONIS Xtratuff treatment is applied to the upper half of the glass, adding toughness, durability and resistance to breakages. This process also reduces wear and tear of stackable glasses
