Apotheke Brooklyn's scents are divine and the Binchotan Charcoal is one of our favorites. The diffuser is made with with natural fragrance in a glycerine base. Cedar wood and sandalwood are combined with notes of amber, patchouli, and a smoky fire to build a broody, strong, and full-bodied fragrance that mimics the scent of Binchotan charcoal. The oil will last 5 months and reeds should be turned weekly.