These amber glass euro dropper bottles are paired with black tamper evident caps with orifice reducers for a highly popular choice when selecting essential oil bottles. The essential oil bottles provide UV protection for light sensitive products that could include aromatherapy oils, homeopathic remedies, and much more. The ribbed tamper evident caps are composed of polypropylene and include an LDPE insert with a 1.5 mm orifice for gradually dispensing products. Be sure to test these essential oil bottles with your product to ensure complete compatibility. Please note that these caps must be screwed on tightly for the orifice reducers to fully insert into the bottle neck and for the tamper evident ring to tear.