Car Humidifier Essential Aroma Diffuser | $10 | Amazon | Use code 4L453PC2
Graphic: Erica Offutt (Amazon)

This travel-sized aromatherapy diffuser can de-stink your car, as long as you’re okay with sacrificing a cup holder. Plus, it can function as a USB adapter with an extra USB port to charge your phone or whatever else you’d like. Use promo code 4L453PC2 to bring the cost down to $10.

Don’t forget the essential oils. This 8-pack is $16 with code TBRER4PU.