The Libbey 15791 20 oz Stacking Mixing Glass is designed for commercial kitchens and bars where durability and functionality are non-negotiable. Its DuraTuff heat treatment process strengthens the glass, making it more resistant to thermal and mechanical shocks—especially at the rim, which is most prone to chipping and breaking. This feature extends its lifespan, reducing replacement costs and downtime for busy restaurant staff. The 20-ounce capacity is ideal for serving generous pours of beer, water, tea, or soft drinks, making it a versatile choice for cocktail bars, breweries, and dining establishments. Unlike standard mixing glasses, its interior rim prevents sticking when stacked, allowing for efficient storage and retrieval without damage, a critical feature in high-volume environments. Whether you're setting up a new bar or upgrading existing glassware, this Libbey mixing glass delivers durability, performance, and practicality. For restaurants and bars prioritizing quality and longevity, the Libbey 15791 is a smart, cost-effective investment that meets the demands of commercial operations.