Oops! Did Game of Thrones forget to take something out of Scene?

Game of Thrones, the most closely watched and scrutinized show on TV, last night aired a huge flub in one of its scenes, as a celebratory feast in Winterfell happened to include a distinctly modern takeaway coffee cup among all the metal goblets of wine. It’s not obvious who the offending coffee drinker on set was, or what flavor of Starbucks brew they enjoy, but the position of the cup was on the grand table of the nobles, in front of Jon Snow’s seat. It’s also not clear whether this was a mistake — which would require all the actors and producers, plus all the editors afterward, to not notice — or some deliberate tongue-in-cheek insertion to get people riled up and talking about the show even more.