This bottle is a 1oz/30mL boston round glass bottle with a 20-DIN neck finish and is sold by the case (360 count). 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.