So of course, people are putting that theory to the test.
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Actress Amanda Jones says she got the idea about mixing balsamic vinegar with sparkling water from her Pilates instructor.
It's supposed to be a healthier version of Coke.
Many people think this is all just a prank.
And Jones says she's getting her fair share of negative comments.
Some people are calling it the 'salad-dressing' soda.
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So our Action News anchors joined in the trend and did the taste test too.
The first step to making it is ice first, then a splash of balsamic vinegar.
Then you top it off with sparking water or seltzer.
Then just give it a stir.
Watch the video above to see our anchors' reaction.