This non-sterile 500mL (16oz) square media bottle is made of durable, shatter-resistant polyethylene terephthalate copolyester, glycol modified (PETG) and comes with a natural high-density polyethylene (HDPE) screw closure. The heavy-walled, durable bottle offers excellent gas barrier properties for storing media and sera, and the clear PETG material allows for easy identification of contents. It is specifically designed for packaging and shipping liquid medias, buffers, and sera. Leakproof bottle features molded-in graduations, and is supplied packed in shrink-wrapped trays. Graduated. Non-Sterile. Shrink-Wrapped Tray Packed. Material: Polyethylene Terephthalate Copolyester, Glycol Modified (PETG). Bottle Style: Media Bottle. Bottle Shape: Square. Neck Style: Narrow Mouth. Closure Material: HDPE. Closure Color: White. Height With Closure: 177mm. Outer Diameter: 74 x 74mm. Neck Inner Diameter: 28mm. Neck Finish: 38-430. Capacity: 500mL (16oz). Nalgene® #: 322020-0500.