This bottle is a 1oz/30mL shiny black boston round glass bottle and has a 20-400 neck finish. The boston round bottle has rounded shoulders and a rounded base, but it is specifically designed to be fitted with child-resistant or standard closures with inverted pipettes. 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 (288 count).