A pencil sharpener taking the shape of a regular bottle cap. After use, the bottle can be thrown away, keeping one's workplace tidy.

A simple design exercise conducted under the creative direction of my 11-year-old niece. Our model is to scale and the thread is fully functional. Each piece can be 3D printed in plastic or ceramic. This screw cap idea has already been explored before but we are having fun and it's all that matters - plus we think our concept looks amazing! :)