Abstract: A bottle single filer for combining bottles (10) fed in a plurality of rows on an inlet conveyor (11) to a single row on an outlet conveyor (14), has a plurality of oblong separators (38), which are controlled so as to be movable through a closed path in which they extend obliquely across the inlet conveyor in parallel with the transverse rows of bottles on it. At a specific location in this path the individual separator moves down between two bottle rows which it follows until the bottles contact and slide along a barrier (17), which is formed by a transfer section of one side rail and forms a smaller angle with the transport direction than the separators, the bottles being pushed on to the outlet conveyor along said barrier. In connection with the side rails the separators ensure that only one row of bottles at a time can pass, to thereby obviate bridge formation and jamming. This also reduces the risk of bottle collision and thus the noise level.