Is it the top of the pen or the lid of the pen?

Answer:
I would think that it would be called the pen cap or the cap of a pen. Top of the pen or pen top may also be used. But I don't really believe that the lid of a pen is the correct use of the word "lid" in the phrase.
First answer by Zula921. Last edit by Zula921. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 2 [recommend question].