Our custom car air fresheners are made-to-order and can feature a design on one or both sides. Initially, the scents are strong, but they gradually become more subtle. The oils continue to release when the freshener hangs in a sunny spot. When the original scent fades, you can easily refresh it with a new one—like your favorite perfume or an essential oil. Each case comes with 25 air fresheners. Please fill out this form after ordering. https://forms.gle/Jm9vY7vgvto6zmKy8