Premium quality glass: These Essential Oil Roller Bottles are made of frosted glass that is durable, corrosion-resistant, and ensures the longevity of your essential oils Rollers balls: The roll balls are made of high quality stainless steel, which is corrosion resistant and well made. The tightness prevents any sort of leakage Wide Use: The sample containers are suitable for storing essential oils; perfumes; fragrance oils; massage oils; sample display; lab test and so on Poytability: The stainless steel roller ball and aluminum cap are easy to use, allowing for even and light application of your oils. The compact size of the bottles makes them perfect for on the go use Multi purpose use: These 10 ml essential oil roller bottles are not just limited to essential oils. You can also use them for perfumes, fragrances and other cosmetic liquids. 10 pack pink glass roller bottles, enough for your daily using