Gaffe-prone Vice President Joe Biden has done it again, this time mistakenly thanking "Dr. Pepper" instead of a Dr. Paper during an afternoon speech at a factory in Davenport, Iowa.

"So let me say it again: Thank you, Terry, and thank you, Dr. Pepper, and thank you, Chancellor - Dr. Paper - and thank you, Chancellor, for this partnership of yours. You are one of the reasons why - you're literally one of the reasons why American companies are now insourcing instead of outsourcing," he said.

Biden was referring to Scott Community College President Dr. Theresa Paper, whose school partners with PCT Engineering Systems to train workers.

The slip-up ignited a social media stir and speculation as to whether Biden had on his mind the popular PepsiCo soda sharing the same name.