The askos form derives from an ancient Greek vessel used to store lamp oil. The earliest incarnation was made of leather. There are several known examples by Paul Storr, including one dated 1836, sold Christie's, London, 15 July 1998, lot 164. A Storr example, also 1836, is illustrated in Michael Clayton, The Christie's Pictorial History of English and American Silver, 1985, p. 256, no. 3.