Ritual's model in the car fragrance category, the car perfume, is cheaper than some (Acqua di Parma, Jo Malone, Diptyque) and more expensive than others (Joya, DS&Durga, Little Trees). It's basically a wood diffuser that clips into your air vent. My pick of the fragrance options: Orris Mimosa ("Life is a journey, so enjoy the ride with this car perfume based on the beautiful fragrance composition of orris root and mimosa flowers, lifted by distinct leathery accents and gentle woody aspects. The car perfume lasts up to 6-8 weeks and is activated by the air flow from your car's fan"). It's $22 at Macy's.