If you're a new or aspiring pen user, let me recommend you get a screw-top -- they won't pop open accidentally as you learn where you like to stash your pen. Th

If you're a new or aspiring pen user, let me recommend you get a screw-top -- they won't pop open accidentally as you learn where you like to stash your pen. This was the cause of more than a few ink incidents for me when I was getting used to carrying a pen!