Replace that outdated rubber ducky with this waterproof HMS Battleship. The floating ship has an FM tuner with auto-scanning, volume control and reset button. At a size of 19 x 5 x 4cm, the HMS needs 2 AAA batteries (not included.) Equipped with missiles and guns, we figure you could probably grab a couple of them at £13.00 (~$19.00) each and have soapy battles with your best bud.