The scent that you notice from the Steripod device is from a material called thymol. Thymol is impregnated in the Steripod tablet and is responsible for the antimicrobial activity of the device Thymol is the same material that is used in many mouthwash formulations as an antimicrobial component, and as such, also have the same or similar scent as what you have noticed when you opened the package. Because thymol is safe for use in mouthwashes, it is also safe for use in your Steripod toothbrush sanitizer and storage device.