The Soleil rear view mirror car charms and oil diffusers are the perfect cute and practical car accessory. These mini macrame hangings feature a wooden bead and come with a 1 mL essential oil dropper. To use, simply hang the charm on your rear view mirror by tying a knot or a bow; the ends of the macrame string are left untied and the charms can be adjusted to your desired length. Then just add a few drops of your favorite essential oil (not included) to the wooden bead at the top and enjoy!