Do you know the one thing a teacher can never have enough of?

Pens. I have found that as a teacher I can never have enough pens. It is crazy. I swear that I am always looking for one. I misplace them all over my classroom. They walk off my desk never to be seen again. People borrow them and never return them. I am often frantically searching for a pen so I can grade papers or just jot down a reminder. I need to get some with my name printed on them. That way I am sure to get them back or at least find the culprit who took them! LOL