Horse Hip Flask Pewter. Another great selection of British made Pewter Flasks with sports motifs. The Horse flasks are available in 4 oz (approx 114 ml) and 6 oz ( approx 170.4 ml). We also offer the following Sports Flasks: Footballer, Football, Rugby, Fishing, Golfing, Sailing, Bowling. Each of our Pewter Flasks are finished to a very high standard of British workmanship. The sports flasks all have a screw cap. Each Horse flask is gift boxed and will be in a satin drawstring gift bag for protection. The Horse flask can be engraving with your logo, name or personal message.