The 20ML Blue Dropper Bottle with 18MM PP Knurling Dropper (Black) is an ideal solution for storing essential oils, serums, and other liquid formulations. Crafted from premium blue glass, it offers excellent UV protection, preserving the quality and potency of your products. The black PP knurling dropper features a glass tube, silicon black rubber teat, and a wiper plug, ensuring accurate and mess-free dispensing while maintaining an airtight seal to prevent leakage.