When you need to maximize every square inch of storage space, stackable Optiva glassware is the perfect solution. It earns its keep combining good looks, space-saving design and the extreme durability you'd expect from Libbey® Glassware. Featuring: Attractive soft square embossment doubles as a stacking "shelf" that allows glasses to stack consistently Design allows airflow to help prevent moisture build up when glassware is stacked Heavy sham increases beverage perceived value Libbey-exclusive DuraTuff® thermal treatment strengthens the upper portion of the glass, producing some of the most durable, glassware in the industry and reducing replacements Like all Libbey Glassware, designs meet today's needs with the right styles for what's trending while delivering dependable performance and durability