About the Dripsticks: "to drip" means to drip, drip, drip - that's already going in the right direction. A Dripstick is a small plastic bottle that can be filled from the bottom, which has a small fabric cushion at the top, as it were at the mouthpiece of the bottle, as a painting tip. If you squeeze the body of the bottle, the paint drips/suppers/runs/flows out of the cushion - depending on how hard you squeeze (Molotow doesn't call this painting tool High-Flow Applicator for nothing!).
A tool, not only, but especially for fast, heavy, large-area work, for dripping effects etc. By the way, a Dripstick also works very well on rougher surfaces and with almost all paints (even more viscous ones) and inks.
The 3 mm Dripstick does not have a soft "cushion" as a tip, but a steel ball. This makes it no less than an oversized rollerball (Uni-ball, Pilot-Gel etc ...), which also writes well on rougher surfaces. Compared to the cushion tip, the steel ball has the advantage that it wears out to a lesser extent when working on hard, rough surfaces and is therefore more durable.