The cup became a social media hot topic after being spotted in front of Daenerys Targaryen in episode four.
The moment occurs a little after the 16-minute mark in the fourth episode of the Star Wars series, which was released on Friday.
Fans have spotted an apparent mistake in the latest episode of The Mandalorian.
The shape in question is quite discreet and can only be spotted if the brightness is fully turned up, but eagle-eyed fans were quick to spot it and flag it on social media.