Because I don’t have a espresso machine I bought some cold brew in a bottle. I got some nice tonic water too and ice cubes, and now I can make a nice Coffee Tonic every morning to enjoy. Ok I agree that it’s better during summer, but every now and then during winter I still want to have a refreshing glass of fruity coffee.
The bubbles are nice, a bit like a alcohol free coctail.
The flavor I would describe fruity, like if you have a black coffee which has low bitterness but high acidity and then you up it a bit with a little bit of sweetness and tardiness. It works very well.
But I tried to do it with coffee which I brew hot and it was not tasty. A good espresso as a base is best, but second best I found is cold brew.