Beauty, Personal Care and Cosmetic Products Design Littli L1 Electric Toothbrush by Xiaojie Liang Littli L1 is an electric toothbrush designed for daily use and for travel. The design removes extra functions and uses a single button, so the toothbrush is simple to operate and lower in cost. Measuring 183 by 19 by 19 millimetres, Littli L1 is close in size to a traditional toothbrush and is easy to carry. The natural colour of the material is kept, which reduces spraying during production. The packaging is a transparent ABS box that combines the cover and the instruction manual and can later be reused as a storage box.