The 10ML Amber Long Dropper Bottle with 18MM PP Knurling Dropper features a high-quality glass tube and a silicon white rubber teat with a wiper plug. The amber glass provides excellent UV protection, preserving the quality of essential oils, serums, and other liquid formulations. The PP knurling dropper ensures a secure grip for precise dispensing, making it ideal for cosmetic, pharmaceutical, and skincare applications.