Premium quality glass: These essential oil roller bottles are made of superior quality frosted glass that is durable, corrosion resistant and ensures the longevity of your essential oils Well Made: The little rollers are made of Stainless steel, which is corrosion resistant help the oil go on smooth, No More Rollers Getting Stuck or Falling Out, fits tightly and can effectively prevent any liquid leakage Stainless Steel Roller Balls: The top of the glass bottle is fitted with a stainless steel rollerball for easy, clean and controlled dispensing of essential oils. Our rollerball glides smoothly for easy application 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 Wide range of uses: Perfect for diluted samples; small batch blends; essential oils; perfume oils; DIY liquid blends creations and also use to give out samples to family and friends. 10 pack green glass roller bottles, enough for your daily using