Abstract: A buffer storage machine for a bottle conveyor line includes a drum 15 rotatably indexed in a frame 14 by a motor 17. A number of radial struts 20 extend outwardly from the drum casing 19, and together with longitudinal members 21, 22, angle brackets 23 and straightedges 25, define sector shaped slots 30 for storing a row of bottles. A pneumatic transport box 32 extends the length of the machine above the uppermost row, and is raiseable to enable drum rotation. The machine is interposed between a bottle manufacturing unit 2 and a bottle filling unit 4 with half of the rows filled and the other half empty, such that if either unit is temporarily stopped, the other unit can continue operating.