These roller bottle plugs with stainless steel ball and matching cap can be used with 5 and 15ml essential oil/pharma bottles with an 18mm neck. Turn your empty essential oil bottles (including doTERRA bottles) into a roller bottle or alternatively, use with your essential oils for direct application from the bottle*.
The cap applies pressure to the ball when fitted firmly, which creates an air tight seal with no leaks.
The plugs and caps can be re-used with quick clean in warm soapy water.
*Before applying essential oils undiluted (i.e. neat), you should refer to relevant reference material to identify if the oil can be applied safely without dilution. Alternatively, speak with your natural health care provider.