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 A new debate ignited the networks. This time it is about three glasses of different sizes that, apparently, are filled with the same amount of liquid.

https://www.youtube.com/watch?v=Qs3s0RNpm3w

Indeed, an employee of the fast food chain Jack in the Box seems to have exposed a scam in the restaurant franchise related to the size of the drinks. However, Internet users believe that it is a well-achieved optical illusion.

The video starts with what looks like a small container filled with soda. The person who is filming the video, pours the full glass into a medium one and the liquid reaches the top. Finally, pour the medium glass into the larger one, filling it almost to the brim as well.

Users quickly pointed out the tricks behind the optical illusion: since the glasses are not shown from above, they claim that the larger containers already had liquid before the contents of the small glass were served.

Another user, posted a video of someone doing the same procedure: since the liquid is transparent, it is more difficult to see the difference in volume between the glasses, but in the end viewers can see that the larger glass is not full.