Machine suitable for removing impurities inside glass / metal / PET containers before filling. Containers enter the machine on a conveyor which feeds a couple of opposed chains with rubber buffers. Air is blown in continuous according to the cycle AIR / STEAM / AIR but in case steam is not requested only air can be used. The distance among the elastomeric buffers mounted on the chains is adjustable at the same time and contemporaneously all along the machine according to the container dimensions. After the blowing clean containers are positioned on the conveyor which feeds them to the Filler.