This sterile 125mL (4oz) square media bottle is made of polyethylene terephthalate (PET) and comes with a natural high-density polyethylene (HDPE) screw closure. The lightweight bottle is shatter-resistant and provides excellent gas barrier properties, with transparency and reduced permeability to CO2 and O2. Ideal for storage and shipping of liquid media, buffers, and sera. It is sterile, non-pyrogenic, and noncytotoxic, with molded-in graduations and a neck ring for use with tamper evident shrink sleeves. Meets current biological testing standards including USP Class VI, USP 661, European Pharmacopeia for Abnormal Toxicity. Bottle and closure material are ADCF (Animal Derived Component Free). Packaged in shrink-wrap tray modules inside a controlled environment manufacturing area. Tray modules are double polybagged inside the master carton for cleanroom applications. Graduated. Sterile. Shrink-Wrapped Tray Packed. Material: Polyethylene Terephthalate (PET). Bottle Style: Media Bottle. Bottle Shape: Square. Neck Style: Narrow Mouth. Closure Material: HDPE. Closure Color: White. Height With Closure: 104mm. Outer Diameter: 52 x 52mm. Neck Inner Diameter: 28mm. Neck Finish: 38-430. Capacity: 125mL (4oz). Nalgene® #: 342040-0125.