The new Yanny or Laurel: Is this mug round or square?

Is this cup square or round? Photo / YouTube

Forget the Yanny or Laurel debate, there is a new viral sensation sweeping social media, with people unable to agree on what shape this gold cup is.

Tony Fisher has created a mug that appears to be both round and square, sparking a furious online debate about it's true shape.

In a video that Fisher uploaded to YouTube the cup just looks like a regular round mug, but if you look in the mirror behind it appears to be square.

He then fills it with milk and stirs it with a spoon to prove that there are no camera tricks at play.

People can't seem to agree on what shape the cup actually is, with many believing wholeheartedly it is square and others seeing nothing but round.

"It is square, the light reflecting on it makes it seem round," someone said.

One person claimed: "Its round, I have one just like that."

There were a few that simply decided it was both.

"It is round on the outside but the inside of the rim is square," one person said.

Another wrote: "The lines are curved, so it definitely not square, but does not form a perfect circle either."

What do you think?