Features: Roller ball: Practical design for bring you a massage effect, the roller on the bottle top can massage skin, which can accelerate absorption to attain better effect, enjoy the using and have more relaxing time. Utility tool kits: Come with compatible dropper for transferring and dispensing liquids, and the perfume storage bottle has designed with golden or silvery cap, screw cap tightly and can effectively prevent any liquid leakage. Material: The essential oil roller bottles are made of glass body and stainless steel roll balls, clear glass ensures you can check the inner easily, the roller design can prevent any leakage while apply the oil. Specifications: Material: glass and stainless steel Color: as pictures shown Capacity: 8 ml (0.27 oz) Package includes: 12 x DIY travel essential oil roller bottles 12 x Clear plastic droppers Note: Not suitable for thick liquid.