Hip Flask Celtic Wire Pewter. We offer this Celtic Wire Hip Flask in a 4oz, 6oz (170 ml) and 8oz with screw cap. This Pewter Hip flask with Celtic Wire bands is a great gift for any occasion. The Flask is finished to a very high standard of British workmanship. All our Pewter Flasks are presented in a gift box including a silky draw-string bag for protection. The Hip flask can be engraved with a name or logo or any personal message.