Parrot beak pencil sharpener. Wait, at school?

I recently read an article which stated that we should only feel nostalgia for things which are no longer with us, and not feel "nostalgic" for the things that are, in fact, still around. If they are around, yes, but for some reason, they are not in our lives anymore, then we could feel "yestalgic". We feel yestalgia for the things still around but which we no longer use. 

Well, I am not sure if the item below should be reason for my nostalgia or my yestalgia. The fact is, it used to be my pencil sharpener when I went to school --much like it also was a pencil sharpener for school children in Japan, where it is made. Today, however, the use of such an item at school would be unthinkable.

Is that nostalgia or yestalgia? How come it was never a problem to have it in my pencil case and sharpen my pencils with it when I was a child?

I owned a pencil sharpener similar to this one. We called it a "parrot beak pencil sharpener" because when you closed it, it was like a little parrot beak closing.

This is the same type, but fancier. It would probably be a great pocket knife to take while hiking or camping.