Disadvantages of stationery boxes?

The disadvantage of a stationery box is that it is made of iron and may rust. It is hard and children will use it as a weapon to beat people. When you put a pencil in a stationery box and then put the box in your school bag, when the bag shakes, the box shakes too, and the pencil lead breaks easily. If you drop the stationery box on the ground, the lid will be broken open and the things inside will fall out. And the stationery box is very bulky.