Grape-bunch flasks have been found all over the eastern and western Roman empire, with later 2nd-3rd Century examples tending to be a larger size than examples dating to the 1st Century.
There are 18 known published examples of the handle-less type like the above lot, including two in the Getty Museum, nos 2003.331 and 2003.330, both in purple glass (see von Saldern, 1974, p. 172, nos 472 and 473) and examples in blue in the Corning Museum of Glass, no. 64.1.8 (see Whitehouse, 2001, p. 125, no. 630), and the Toledo Museum of Art no. 1951.373 (see Stern, 1995, p. 190, no. 119).