Abstract: There is described a method of aseptically filling a plurality of nested containers with a pharmaceutical product and applying closures to filled containers in an aseptic environment, said method comprising: removing any coverings from the nested containers and nested closures; locating the uncovered containers laterally adjacent to the closures on a shuttle; moving the uncovered containers and uncovered closures to an aseptic filling zone; transferring the uncovered containers and closures to a multi-nest holder; locating the uncovered containers laterally adjacent to a plurality of closures in the multi-nest holder; filling the containers with a pharmaceutical product; removing a closure from the nest of closures into a closure transfer device; moving the nest of filled containers beneath the closure transfer device; and removing a closure from the closure transfer device into the filled container thereby scaling the filled container.