This 30mL (1oz) opaque amber high-density polyethylene (HDPE) narrow-mouth packaging bottle is supplied without a closure, to assist in feeding into filling lines. It meets USP light transmission standards and is manufactured in compliance with USP requirements for light resistant containers. This bottle is leakproof when used with the appropriate Nalgene® closure. A variety of closure options is available separately. Bulk Packed. Leakproof. Bottle Material: High-Density Polyethylene (HDPE). Bottle Color: Opaque Amber. Neck Type: Narrow Mouth. Closure Material: None. Height Without Closure: 58mm. Outer Diameter: 34mm. Neck Inner Diameter: 14mm. Closure Size: 20mm. Neck Finish: 20-415. Capacity: 30mL (1oz). Nalgene® #: 362085-0001.