Haven't got a high end car diffuser yet? (Yeah, neither do I.) Here's Jo Malone's model: "Sleek and sophisticated, the refillable Jo Malone London Car Diffuser easily and securely attaches to the air vent to enhance every journey with fragrance. Add a Refill to scent the journey with zesty Lime Basil & Mandarin, voluptuous Peony & Blush Suede or fresh Wood Sage & Sea Salt." The empty case is $67 and the scented refills (said to last about 3 months) are $36, at Macy's.