You can bring your own, but technically you can only drink it in a private room. That said, I've seen people sipping in coach or in the observation car on every

You can bring your own, but technically you can only drink it in a private room. That said, I've seen people sipping in coach or in the observation car on every trip I've taken. Be discreet and don't overdo it. I've also seen a guy left in a tiny desert town in the middle of the night for being a belligerent drunk.