・ Pencil sharp can be used attached to PET bottles finished drinking.
・ "Plastic pencil sharpener for PET bottle" which plenty of shavings in PET bottles, throw them all together at once. It is a product that can reduce worry of polluting the room with shavings.
・ You can effectively use it as a pencil sharpener by simply attaching a Kesri cap to an empty PET bottle.
・ When using 500 ml PET bottle, you can save the scrap of about 10 pencils.
・ Since they are thrown together all at once, the anxiety of polluting the room is alleviated.
