The 4 oz. Bar & Kitchen PROFESSIONAL Measuring Glass by Libbey is a classic, durable measuring tool made of glass. It has a capacity of 4 oz and includes half measurements, making it perfect for use in bars, restaurants, and homes. With its professional-grade design and high-quality construction, this measuring glass is a must-have accessory for any bartender or home cook looking to accurately measure liquids for recipes or cocktails.