Sterile, PETG Square Media BottlesSterile, polyethylene terephthalate copolyester (PETG) media bottles Nalgene 2019 series Bottles provide reduced permeability to CO2 O2 to minimize outgassing and pH shifts; especially suited for media storage Transparent, radiation sterilized, non cytotoxic and non pyrogenic Maximum use temperature to 70C (150F) Permanent molded in graduations White, HDPE closures Leakproof Shrink wrap band assures product integrity. Packed in shrink wrapped trays