Corning polystyrene Storage Bottles are now available as closed system solutions. They are sterile and arrive individually double-bagged and preassembled. The preassembled transfer caps have two ports. One port ends in a 0.2 µm filter, and the other port is chemically resistant, heat sealable flexible tubing, ending in a Male MPC. The dip tube reaches all the way to the bottom of the flask for easy aseptic transfer of your liquid handling processes. Corning polystyrene Storage Bottles are now available as closed system solutions. They are sterile and arrive individually double-bagged and preassembled. The preassembled transfer caps have two ports. One port ends in a 0.2 µm filter, and the other port is chemically resistant, heat sealable flexible tubing, ending in a Male MPC. The dip tube reaches all the way to the bottom of the flask for easy aseptic transfer of your liquid handling processes.