Plain Hip Flask Pewter. A beautiful Plain Pewter Hip flask with 2 shiny bands around the top and bottom of the flask. We can offer this range of Pewter Hip Flasks in a 4 oz and 6oz (170 ml). All our Pewter Flasks are presented in a gift box including a silky draw-string bag for protection. A great gift for any occasion for use when out and about. The Hip flask has a screw on cap and is finished to a very high standard of British workmanship. This Plain Pewter Hip Flask has ample room for engraving.