This 500mL exp. (16oz) square media bottle is made of durable, break-resistant polyethylene terephthalate copolyester, glycol modified (PETG). It comes with a high-density polyethylene (HDPE) closure with a silicone/PTFE septum, providing a PTFE fluid contact surface that is inert and nonstick to ensure fluid integrity. Ideal for packaging of biological and diagnostic reagents that require aseptic dispensing or addition of supplements by syringe. The leakproof, transparent media bottle has a square design that saves valuable shelf space. Gamma irradiated to 10-6 sterility assurance level (SAL), this noncytotoxic bottle meets USP Class VI standards. Packed in shrink-wrapped trays in double-polybagged cartons. Leakproof. Transparent. Shrink-Wrapped Tray Packed. Sterile. Material: Polyethylene Terephthalate Copolyester, Glycol Modified (PETG). Bottle Style: Media Bottle. Bottle Shape: Square. Neck Style: Narrow Mouth. Closure Material: HDPE. Closure Color: White. Septum Material: Silicone/PTFE. Height With Closure: 178mm. Outer Diameter: 75 x 75mm. Neck Inner Diameter: 28mm. Neck Finish: 38-430. Capacity: 500mL Exp. (16oz). Nalgene® #: 342023-9500.