Not cold coffee! As the name suggests, coffee is brewed cold when it comes to cold brew. This makes it taste much less bitter in the end than if you were to brew it warm and then let it cool down. Cold brew concentrate is also very easy to prepare. It is best to fill it into a bottle afterwards and store it in the fridge. And as soon as you feel like it: just add water or (plant-based) milk, a few ice cubes and enjoy.