Sailing Boat 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 Sailing Boat embossed on the front. We also offer the following Sports Flasks: Footballer, Football, Rugby, Fishing, Golfing, Equestrian, Bowling. Each of our Pewter Sports Flasks have a screw cap. The Pewter flask with Sailing Boat 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.