The convenience stores of Westeros have done good business in recent weeks.

Just two weeks after eagle-eyed viewers spotted a rogue takeaway coffee cup in an episode of "Game of Thrones," the show's highly anticipated finale left fans bemused once again.

This time, a plastic water bottle made a cameo appearance. Eight years of fighting for the Iron Throne can leave you a bit parched, after all.

Viewers spotted it tucked behind Samwell Tarly's foot, and the show was in hot water on Twitter just moments later.