From Serge Lutens, a car diffuser that uses the same cartridges as the brand's electric (home) diffuser. "Distinctive and elegant, the car scent diffuser has been designed to receive Serge Lutens at Home scented diffuser cartridge to provide an almost immediate diffusion of the chosen fragrance. Interchangeable at any time, they conjure up a memorable olfactory journey over and over again." $68 at Serge Lutens; the cartridges are $56 each.
From People I've Loved, the Rose Air Freshener: "Love Stinks. From the mustiest corners of our hearts, this air freshener makes a great gift for the romantic / anti-romantic person in your life. Hang it anywhere that needs a little freshening up—it smells like a rose!" $6 at Beautyhabit.
To match their new After Sun Eau de Toilette, Vacation's After Sun Air Freshener hang tag: "The Vacation® After Sun Air Freshener features the “vivid” and “quenching” aroma found in our famed Vacation® Brand After Sun Gel. It contains notes of aloe vera, cucumber water, citrus colognes and freshly folded resort towel all conveniently diluted into an air freshener form suitable for home, car, office or junior hotel suite." $5 at Arielle Shoshanna (and yes, they do make an actual After Sun gel too).
If Nordstrom puts these on mark down, I might pick up a Greenhouse Scented Air Freshener Tag from Earl of East: "A fresh blend of sweet vine tomato, parsley seed and basil, Greenhouse is inspired by the rural villages of the Greek mainland." $18, and also available in Smoke & Musk and Jardin De La Lune.
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.