It is coca-cola with coffee in it. It tastes like coke but with a coffee taste as well and by “coffee” I mean that coffee flavour that a coffee flavoured milkshake or a coffee flavoured cake tastes of.
There is also a weird slimy quality to it. It’s like drinking coke but a bit more unpleasant.
The coffee is “real” and from Brazil. If I was Brazil I might object to the free advertising.