These aromatherapy diffuser necklaces will allow you to wear your favourite essential oil. Each locket contains a tiny piece of pad which holds a few drops of oil that slowly diffuses through the ventilation holes on the front. The scent of your oil can last for several days, but you can always top up more oil to the pad after the oil has completely diffused. Each necklace comes with 10 assorted colour pads. Lockets are available in two sizes 25mm and 30mm in diameter and 5mm in thickness and are made of stainless steel to ensure the oils do not tarnish or breakdown the metal over time.