I can't keep a pen, capped or unclicked. I have ruined to many uniform shirts and pants from pens that are made for desk jockeys. It doesn't matter if its a bolt, clicky, threaded cap they all will come open and bleed into my pocket of my pants or shirt. SO, Why doesn't someone make a safety cap pen, similar to a prescription pill bottle. Something that is capped and threads on, but requires the cap to be pushed down to engage the threads, to then be unthreaded. Does such thing exist and I just can't find it?