Mixing Glass, 20 oz., heat treated, (Top diameter 3.75", bottom diameter 2.50"). Libbey Mixing Glass old # 5137. With innovation as its cornerstone, Libbey quality, consistency, and exceptional customer service have become the standard in the industry. Libbey continues to invest in state-of-the-art production equipment and faster and more efficient manufacturing technologies, allowing it to create the most significant introductions in the foodservice and consumer markets.

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