Correct pour in ounces of Grand Marnier in a snifter?

one ounce I enjoy a fine snifter of Grand Marnier from time to time, but not often. That being said, I must say that as long as the snifter is not more than half full, it's fine with me. A normal person would be more than happy with a shot and a half, 3 ounces about. If they decide to be crazy and have more, then they can have a bit more. Don't pour it unless you are sure someone will be drinking it in moderation and safely without an automobile nearby. It's truly a sin to waste it.