These 1/3 oz (10 ml) Clear glass bottles with stainless steel rollers and black caps are sold in a pack of 5 bottles, rollers, & caps. . They are great for dispensing essential oils and blends.
You can use a plastic pipette or glass dropper to fill the bottle. After you have added your oils to the bottle make sure to press firmly down on the roller, as this will help avoid leakage. Bottles containing oils or liquid should be stored and transported upright to prevent leakage.
Please note: Stainless Steel Rollers have been tested for years with minimal issues. However, when using a carrier oil like Fractionated Coconut Oil, the roller balls may loosen when in use because it is a lighter and more lubricating oil.