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