An air conveyor adapted for moving containers having a top portion with a collar with a downwards face by applying a pneumatic force on said containers, the conveyor comprising: - An gas directing means adapted for directing gas towards the container to be moved; - A supporting path comprising a first supporting guiding profile with a first lateral guiding edge and a second supporting guiding profile with a second lateral guiding edge, said second lateral guiding edge being distant from the said first lateral guiding edge for defining there between an open space for the top portion of the containers to be moved, said first and second supporting guiding profiles (11,12) having each an upper face (11U,12U) acting as supporting face contacting a portion of the downwards face of the collar of the top portion of the containers to be moved, whereby the first supporting guiding profile and the second supporting guiding profile are associated respectively with a first lubricant dispensing means and a second lubricating dispensing means, said first and second lubricant dispensing means (20,30) comprising each a dispensing channel (21,31) having an inlet (211,31I) adapted to be connected to a lubricant dispensing system, and an outlet (21O,31O) with an outlet opening (22,32) with an equivalent diameter of 0.3mm to 15mm, especially between 0.5mm and 7mm, characterised in that, the first and second lubricant dispensing means (20,30) are each a flat insert with a thickness of preferably less than 2 cm, a length of preferably less than 15cm and a width of preferably less than 5cm, made of a plastic and/or metallic material, said flat insert comprising an one piece body with an inner channel (21,31) defining the dispensing channel element having an inlet (21I,31I) adapted to be connected to a lubricant dispensing system, and an outlet (210,310) with an outlet opening with an equivalent diameter of 0.3mm to 15mm, said one piece body having a free edge (21E,31E) extending from a first end up to a second end, said one piece body being adapted to be mounted on or associated to the first or second supporting guiding profile (11,12), possibly with interposition of an intermediate element, so that the free edge (21E,31E) of the one piece body forms a continuous extension of the first or second lateral guiding edge (11E,12E) of the first or second profile (11,12), whereby said one piece body comprises a flat surface (21U,31U) adjacent to the said free edge (21E,31E) and adapted for supporting a portion of the downwards face of the collar of the top portion of the containers to be moved, and whereby said outlet opening (22,23) extends at least partly along said flat surface (21U,31U) adjacent to the said free edge (21E,31E), whereby the first and second supporting guiding profiles (11,12) comprise advantageously each a longitudinal support system (110,120), at least two supporting guiding strips or flaps (111,121) adapted to be attached on the longitudinal support system of the first or second supporting guiding profiles (11,12), said at least two supporting guiding flaps or strips (111,121) having a free longitudinal edge (11E,12E) adapted to form a portion of the first or second lateral guiding edge element, the said first and a second supporting guiding strips or flaps (111a,111b,121a,121b) of said at least two supporting guiding profiles (11,12) being separated the one with respect to the other by a flat insert (20,30) attached to the longitudinal support system (110,120), said flat insert (20,30) comprising an one piece body having a free edge (21E,31E) extending from a first end up to a second end, said one piece body being mounted on the longitudinal support system (110,120) so that the free edge of the one piece body forms a continuous extension between the free longitudinal edge of the first supporting guiding strip and the free longitudinal edge of the second supporting guiding strip, - An gas directing means adapted for directing gas towards the container to be moved; - A supporting path comprising a first supporting guiding profile with a first lateral guiding edge and a second supporting guiding profile with a second lateral guiding edge, said second lateral guiding edge being distant from the said first lateral guiding edge for defining there between an open space for the top portion of the containers to be moved, said first and second supporting guiding profiles (11,12) having each an upper face (11U,12U) acting as supporting face contacting a portion of the downwards face of the collar of the top portion of the containers to be moved,