Pentel Pocket Brush Pen. I have had a couple of Sakura, Copic and other felt tipped brush pens and I hated every single one of them. The tip was never very flexible and wore out super quickly too. Junk. So I ignored recommendations on this pen brush hybrid for ages until I learned that the brush has actual individual fibers like a real brush. Very similar to the waterbrushes I use for painting on the go except instead of water it houses waterproof fast drying black ink. Last weekend I used a coupon to pick one up at a reasonable price and I am so glad that I did. The tip is soft and flexible yet very durable and refillable. As a bonus the ink dries super fast and this lefty doesn't have to worry about smearing or a black stained side of my hand. So far the only downside I can find is that I used up an ink cartridge in less than a week and refills are rather expensive. I tried to refill the empty cartridge with bottled ink and an eye dropper and I ended up with black ink all over my hands instead of in the cartridge. It is very different from any other pen I have ever used and takes a delicate and sure touch that I am still getting used to with practice. I ordered a package of ink refills.