Get these car diffusers - caution: they may be your brands new best seller! These last for 30-60+ days depending on how often people rescent. Many retailers sell these between $8-10/per Diffuser - each unit will come with a care card or we have a video you can provide a QR code to for people to reference! Order a tester so you people know what each scent smells like without opening! Have questions on any of these scents? Feel free to reach out!