I don't think anyone has mentioned the Pentel Energel. I've purchased perhaps every pen currently available at office supply stores as well as many that aren't at places such as jetpens which has imported from Japan pens. I own multiple space pens...not my favorite at all. They lay down a skipping non-consistent line for this lefty. Though I do have one in my Maxpedition EDC bag for those properties mentioned by others. For the best disposable pen I've currently found you may want to grab a pack of Pentel Energel in .7mm with caps. Don't go smaller and don't go clicky. It puts down the blackest, best line I've seen in a while. Just my personal mileage. Reviews on the pen on Amazon are also favorable especially for us lefties. Buy the capped version for carry. The ink in the clicks can wick into clothing. I ruined 2 pair of shorts before I learned my lesson. I've really purchased every pen over the years. It's a personal challenge to find the better mousetrap for me. Zebras are very good but I don't prefer as a lefty.