Abstract: Apparatus for filling containers from individual volumetric dispensers as both move rapidly along a straight-line path. The dispensers are moved in a closed loop and filled while travelling along another straight-line path opposite the dispensing straight-line path, by forcing flowable product upwardly into the open lower ends of the dispensers as they slide over a filler slot. To prevent flow of the product upward between the dispensers, a mechanism is provided which automatically locks the ends of the adjacent dispensers against each other to provide a seal against inter-dispenser product flow, and which automatically decouples the containers after their filling so they can turn with respect to each other, as is necessary as they negotiate curves in the closed-loop path along which they travel.