This 500mL (16oz) natural high-density polyethylene (HDPE) round-shaped bottle has a wide-mouth designed for ease of filling and dispensing, and comes with a natural polypropylene closure. The leakproof bottle offers excellent chemical resistance, with uniform walls that resist splitting and puncturing. Bulk Packed. Leakproof. Bottle Material: High-Density Polyethylene (HDPE). Bottle Shape: Round. Neck Type: Wide Mouth. Closure Material: Polypropylene. Height With Closure: 168mm. Outer Diameter: 73mm. Neck Inner Diameter: 44mm. Closure Size: 53mm. Neck Finish: 53-415. Capacity: 500mL (16oz). Nalgene® #: 312104-0016.