We were wondering why replaceable heads are not accepted by a broad mass of customers, although it is a great idea considering the ecological impact. After we examined different types of toothbrushes using a replaceable head system, we came to the conclusion that from a users perspective this principle is not well-thought-out. The replaceable head is mostly very tiny and users need to touch the unhygienic used bristles. In addition we also found out, that the handle gets used off very quick, therefore you never have the feeling of a new product. That`s why we decided to design a replaceable neck, users already know from electric toothbrushes and are used to. Using this principle we can save plastic material, while offering high hygienic standards.