Why do we love the "Downton Abbey" cast? Because they know how to laugh at themselves and stay hydrated.
Earlier this week a new photo from "Downton Abbey" Season 5 went viral for a hilarious historical error -- there was a plastic water bottle on the mantelpiece. This wasn't just some behind-the-scenes photo either, it was an official press photo. Yet, the ladies and gentlemen of Downton aren't ashame...
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