My link was for this part:
The amber moon is featured in the 1974 mystery film
Murder on the Orient Express, based on the 1934 novel by
Agatha Christie. In the film, the butler Mr. Edward Beddoes, played by
John Gielgud, brings this drink in the morning to his employer, Mr. Samuel Ratchett, just prior to the discovery of the murder. Beddoes knocks on the door of the dead man's train compartment and announces, "It's me sir, Beddoes, with your pick-me-up. Your Amber Moon, Mr. Ratchett." Beddoes is later questioned about the death of Ratchett, later revealed to be vile child murderer Lanfranco Cassetti, by the detective
Hercule Poirot and relates, "His breakfast was his Amber Moon. He never rose until it had had its full effect."
[5] The amber moon in the film was prepared with vodka instead of whisky.