Glass medical devices such as medical containers are manufactured and annealed by heating in an oven which produces a clean device having a low bio-burden. Plastic medical devices and medical containers are formed by plastic molding devices which produce a clean device. The clean devices are immediately transferred to a controlled environment to maintain a clean work area. The work area can be a clean room or localized area to avoid the need to maintain cleanliness levels in an entire room. Syringe tip closures can be introduced into the housing assembly, where syringe barrels and tip closures are cleaned with filtered ionized air and the tip closures are coupled to the barrels. The syringe barrels or medical container can be filled with a substance and a closure member is attached.
