Aqua Regia. Comes from the same place as those cigarettes.

[Which means that you will probably choke on it some if you try it, James. But Stark won't hold it against you if you do. He did his first time.]

[Didn't stop him from laughing at Cassel, but lbr, Cassel deserves it.]

You're welcome to try it or stick to your martinis. No judgment here if you don't want any.