Botte filler  beer gun specification:

Fill bottles quickly, easily,without the risk of oxygenation and without complicated counter pressure filling equipment. This easy to use Bottle Filler Beer Gun works with almost any bottle size and shape. The gun comes with two triggers. One that will purge the bottle of oxygen and the other that will dispence the beer. This gun is also suitable for win bottling or dispencing directly intoglass for immediate drinking.