Yes. We use a unique patented double bag system, whereby the pressure medium (CO₂.) in the outer bag is completely separated from the beer volume (inner bag).This allows the keg to be connected and disconnected without the liquid making contact with compressed air. Oversaturation with CO₂ will thus be excluded. The bag material is covered by a new, revolutionary material which has particularly high O₂-barrier properties. All of this without the use of aluminum, because it is very harmful to the environment and moreover, aluminum micro-cracks would perforate the bag when unfolding. All our kegs are produced with our double bag system so no more need for cleaning, rinsing, steaming, blow drying etc.