Nalgene™ Narrow-Mouth Amber HDPE Economy BottlesNalgene Narrow Mouth Amber HDPE Economy Bottles Conduct light duty, general purpose applications where a heavier bottle is not required with these narrow mouth amber HDPE bottles. Capacity: 4 oz., 125mL Capacity (Metric): 125 mL Capacity (English): 4 oz. Color: Opaque Amber Description: Amber Narrow Mouth Economy Bottle Diameter (Metric) Inner Neck: 18mm Sterility: Non sterile Type: Narrow Mouth Bottle Closure Color: Amber Neck Finish: 24mm