They wanted to imply the C is for coconut and this is coconut water but really all they did to people that passed middle school (which you'll get to soon enough) is say "this is dicarbon monoxide."
I don't know what would happen if you were to drink C2O but it probably wouldn't be good, making this a drink marketed to idiots by idiots (marketing majors)
So that's great that 'C'subscript-2'O' means dicarbon monoxide, what are the biologic implications of drinking dicarbon monoxide (for those of us who are only 10 and a half and haven't passed middle school yet)?
Apparently it's not even really all that stable, so that whole container would rapidly decompose into probably carbon dioxide (CO2) and a bunch of pure carbon (think charcoal). At least that's my hunch. There is a Wikipedia article on the stuff, but it's pretty short, since it's a pretty unusual chemical (https://en.m.wikipedia.org/wiki/Dicarbon_monoxide ).
CO2 is of course extremely common. I'd love to see what a chemist can describe about a bottle of C2O though!
They have replaced the H in the chemical formula for water (H2O) with a C to represent "coconut". However, C already stands for a chemical element, carbon. That implies this product is a compound made of two carbon atoms and one oxygen. If such a thing exists, it would be incredibly unstable and react with anything it touches; you certainly would not want to drink it.