There are two main types of bottle fillers on the market - Counter Pressure and Blichmann-style. They both do the same thing, however the Blichmann type is faster and easier to use and makes bottle filling from a keg a real breeze.
Blichmann-style bottle fillers are now more affordable than ever and makes transferring your keg beer very easy, whether it's into bottles, a 2 ltr growler or even a smaller keg. Bottle fillers will fill your bottles without losing carbonation or oxygenating your beer (which tastes foul), and there is no waiting for the head to dissipate before capping the bottle.
Watch a video here to see how easy it is.