Bracelets are made with a variety of charms, smaller natural stone beads, and coconut discs. The coconut discs have oil-diffusing properties - simply rub a drop of essential oil into the discs. The coconut discs are naturally porous and will absorb the oil and retain the scent for approximately 24 hours. The coconut discs get darker as they absorb the oil. They will become lighter again when the oil evaporates and you will know it is time to add more.