Tumblers are versatile drinking glasses for whiskey to water. Many classic cocktails are also served in tumbler glasses. There are tumblers in different sizes. They are roughly divided into Old Fashioned Glasses - also called Single Old Fashioned (S.O.F.) - and Double Old Fashioned glasses (D.O.F.). A (Single) Old Fashioned glass has a capacity of up to 300ml, while a typical Double Old Fashioned glass holds between 300ml and 470ml.