What is your favorite nursing gadget (can be practical and necessary, like your stethoscope or nursing shoes, or just for fun).
I admit that I am a bit of a freak about office supplies in general, and nursing things in particular. I don't take much to work with me, but I am really particular about my favorites. For example, I love these EKG calipers. I have the green ones. I don't know why. It's not like they do magic tricks or anything. I just coveted them for a long time til I caved in and bought.
http://www.mackinmfg.com/caliperpens.html
So what's your weird nursing gadget obsession?