A device which allows beer bottles to be filled with minimal splashing, thereby reducing aeration/oxidation of the finished beer. A typical bottle filler consists of a rigid plastic tube (metal versions are also available) long enough to reach the bottom of the bottle, and a valve which is opened by pressing the tip of the filler against the bottom of the bottle.  Can be attached directly to the end of a syphon hose, or to the spigot of a bottling bucket.