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The internet is flummoxed by this optical illusion of the same amount of soda filling up 3 different-sized fast food cups

Screen_Shot_2017 11 21_at_10_11_10_AM
This video might have you believing that the same amount of liquid fills up three different-sized cups. @ilikegirlzsz/Twitter

  • A video circulating on Twitter shows what appears to be the same amount of liquid filling three different-sized cups from the fast food chain Jack in the Box.
  • Twitter users were quick to debunk the optical illusion.
  • Another video posted on Twitter shows a more accurate depiction of pouring liquid into small, medium, and large Jack in the Box cups.

 

The internet doesn't know what to think of an optical illusion recently posted on Twitter, in which a person fills three different-sized fast food cups with what appears to be the same amount of soda

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The video begins with what looks like a small-sized cup filled with soda. The person filming pours the full cup into a medium-size cup and the liquid fills it to the top. Finally, they pour the full medium cup into a large-size cup, filling it nearly to the brim as well.

According to Jack in the Box's menu, drinks come in four sizes — 16, 20, 30, and 40 ounces. It's unclear which size cups were used in the video, but we can assume that the small cup used is 16 ounces and the medium cup is 20 ounces.

Check out the video for yourself here:

The internet was understandably confused by this strange experiment that resembles that of a high school physics class.

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Other Twitter users were quick to call out possible tricks behind the optical illusion, alleging that the medium and large-sized cups already had liquid in them before the contents of the small cup were poured. Since the cups are not shown from above, they could have already been partially full when the liquid from the small cup was poured.

And while anyone who watched the video was effectively stumped, at least momentarily, it seems that the case has been closed on this optical illusion.

Another Twitter user posted a similar video of someone pouring a small cup of water into a medium then a large cup. Since the liquid is clear, it's harder to see the difference in volume between the three cups, although ultimately viewers can see that the final large-sized cup is not full.

 The rolling-eyes emoji says it all. 

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