Counter pressure filling is how a brewery bottles beer. The bottle is under pressure while the carbonated beer flows in. Because the interior of the bottle is pressurized there is minimal loss of the CO2 in solution. The opposite of filling under pressure is when you pour a beer into a pint glass where CO2 erupts out of solution creating all that foam. Great in your glass but not good when you are trying to bottle carbonated beer. Our counter pressure filler mimics a single filling head on a professional bottling line, a concept that we all know works very, very well. The design has two unique features. First, it is the only model made entirely from stainless steel. Second you flush and fill from the bottom of the bottle.