Update: Deal over.

Little Trees Car Air Freshener | Vent Wrap Provides Long-Lasting Scent, Invisibly Fresh! | Black Ice, 4-Packs (4 Count) – Link

Amazon has this currently marked down to just $2.79.

• FRESHEN YOUR LIFE: Make your car Invisibly Fresh with LITTLE TREES Vent Wrap – an air freshener that blends in with a scent that stands out
• INVISIBLY FRESH AIR FRESHENER: The slim design allows air to flow freely while delivering a consistent, pleasant scent
• DISCREET DESIGN BLENDS INTO CAR VENTS: Slides onto an auto vent blade for a seamless and hidden look; notice the scent, not the air freshener
• STEDISCENT TECHNOLOGY: With two weeks of steady fragrance per Vent Wrap, a 4-pack delivers up to 60 days of fragrance
• STAY-FRESH POUCHES: Vent Wrap comes in a stay-fresh pouch, sealing in the fragrance until you are ready to use it
• MADE IN THE USA: Rigorous testing and high quality standards ensure a premium fragrance experience made from only the best ingredients.