Libbey 8.5 oz. Irish coffee glass mugs are certain to please with their distinctive classic shape and modern design. These mugs are perfect for all types of warm beverages including coffee, tea, and hot chocolate. These glasses measure 5 7/8" high, 3 1/8" top diameter, 2 3/4" bottom diameter, and have a maximum diameter of 4 1/8". Libbey 8.5 oz. Irish glasses coffee mugs are sold in a case of 12 (one dozen). Original packaging. Gift box. Libbey products combine quality and durability in a wide range of glassware products. Libbey produces appealing and durable glassware for the restaurant industry. Founded in 1818, Libbey has become a renowned leader in glass tableware, flatware and ceramic dinnerware for the food service commerce, including hotels, bars, catering.