This bottle is a .5oz (15mL) amber boston round glass bottle with a 20-400 neck finish. The boston round bottle is distinctive in its classic shape. Characteristic of the boston round are its rounded shoulders and rounded base. Glass has high clarity, can be colored, has high chemical-resistance levels and extremely high resistance to heat and cold. It is great for storing oils. The matching dropper assemblies are available in multiple closure styles and are equipped with the DripTrap patented bulb, which eliminates leaking. There is also an option for graduated pipettes, perfect for accurate dosing. These bottles are sold by the case (180 count).