A number of comparable flasks can be found in Mark Zebrowski, Gold, Silver and Bronze from Mughal India, London 1997, pp.202-3, nos. 301 and 308-315. The design, Zebrowski writes, evolved in order to carry water and wine on journey or into battle and the shape related to the pilgrim flask of medieval Europe and was, as R.H.Pinder-Wilson (and M. Tregear, "Two Drinking Flasks from Asia", Oriental Art, Vol. XVI, no. 4, winter 2970) originally suggested, probably derived from the leather containers often depicted in Mughal and Persian painting.