500ml Clear PET Plastic Octagonal Media Bottle w/Cap, Sterile, 24/cs (Corning® #431733) 68W733 is the clear 500 ml Corning ® polyethylene terephthalate (PET) plastic octagonal media bottle with screw cap that can be used for sampling and storing media, biologicals, and other types of aqueous solutions. This lightweight and break-resistant bottle has been sterilized to SAL 10 -6, making it suitable for immediate use.