Charcoal, the basic material for drawing, can be lost easily because it is tiny and

fragile. This object is used as the charcoal container. It is designed to have three

parts: the bottom, the body and the top of the charcoal container. The spiral

structure on the body and the top of the container makes it much more stronger.

The hollow structure on the bottom enables the container to pull in or out

conveniently, thus when you are going outside, you can pull it out and put the

container in your pencil-box, and when you come back you can return the

container to the bottom. The container can save 5 charcoals maximum at the

same time and the high of the container equals to that of charcoal, therefore it is

safe to save your charcoals inside.