I don’t think there is any rustica in Red Bull, but aside from that, I’m ordering 20 of those tappers at a time for a coworker, who is using it to quit smoking. He uses 1+ a week. It does have a good nic hit and satisfies his need. He’s actually going through them quite slowly, to my surprise. And the 7g tappers are a nice size for carrying. I’ve been using a singletons SM round tapper, since it has a nice size dispensing hole, and I don’t have to fight it, but I wish the RB tapper hole was a bit bigger, and I would continue with them. Perfect size. Waiting for Roderick to get the German tap/pinch boxes to try out.