Does 'Winterfell' have a secret coffee shop?

A viral thread on social media is bringing attention to a tiny, but glaring mistake in today's episode of Game of Thrones. In the 4th episode of the season, the army that defeated the Wights is seen celebrating at the Stark castle. But if you look closely, among the fancy silver goblets, you will spot a coffee cup, probably from Starbucks, on the table. It's given Twitteratti another reason to garner laughs at the show's expense with hilarious memes.