Libbey 15248 Gibralter Rocks Glass, 4-1/2oz (Case of 36)

Libbey's 4-1/2 oz Gilbraltar rocks is DuraTuff. Libbey's DuraTuff treatment is a special thermal afterprocess for "pressed"" tumblers, performed only on the upper portion of the glass to increase resistance to thermal and mechanical shock. Dimensions of the rocks glass are 3-1/8"" high, 3"" top diameter, 2-1/8"" bottom diameter, and 3"" maximum diameter."