Rocks glasses are for spirits and cocktails served over ice. Capacity: 10-12 oz. Lancey standard is a heavy-bottomed double old-fashioned (~$8/glass). Holds: Old Fashioned, Negroni, Boulevardier, Penicillin, Mai Tai, Painkiller, Sazerac, Manhattan-on-rocks. Tumble-washed. The big cube goes in first.