These are amber glass boston round euro dropper bottles with 18-DIN neck finish and is specifically designed to be fitted with tamper-evident, child-resistant droppers and caps with inverted dropper tips.

Glass has high clarity, can be colored, has high chemical-resistance levels, and has extremely high resistance to heat and cold. It is great for storing essential oils. This container is amber, a rich and vibrant orange-brown. In the case of glass, this amber color is made by mixing sulfur, iron and carbon into the base glass. This amber color provides some UV protection for light-sensitive products. This item has an 18-DIN neck finish. The first number refers to the diameter (in mm), and the second refers to the closure depth, style and thread. 

Each bottle comes with a black euro dropper cap.