This opaque black glass dropper bottle is designed for light-sensitive skincare serums and essential oils.  The solid color spray painting blocks UV light penetration to protect active formula ingredients, while the thick hard glass construction provides physical durability.  Available in 20ml, 30ml, 40ml, and 50ml capacities, the bottle features an inner dropper stopper to prevent leaks and a smooth cylindrical surface optimized for wrap-around sticker labels.