10 ml amber glass euro dropper bottles are paired here with black tamper evident caps. Amber glass provides UV protection for light-sensitive components, assisting with keeping your products maintained when storing. Euro dropper bottles are designed with a long neck, which includes a ring at the end of the threading for pairing with tamper evident caps. These tamper evident caps have a multi-functional construction. The tamper evident caps are ribbed for an easier grip when opening. Below the ribbed, threaded area of the caps is a tamper evident ring. Once the tamper evident caps have been secured, the tamper evident ring sits just below the collar molded into the neck of the euro dropper bottles. When the tamper evident caps are removed, the perforated ring separates from the caps and remains on the bottle neck, indicating the product has been opened. These small glass bottles also feature orifice reducers that gradually dispense products like essential oils, pharmaceuticals, and more!