Scientists at the University of San Paolo in Brazil, the largest coffee producer in the world, have conducted tests involving experts and coffee addicts to see whether the shape of a cup and its texture affects its taste or the experience of drinking coffee in general.

They found that the feel of the cup made a huge difference in the results, in which more than 230 people participated.

Where high-quality Brazilian coffee was presented in a soft ceramic cup and another made of white ceramic with rough ends inside and outside, and the two cups carry the same shape and weight.

People who experimented with said that the coffee taste was sweeter when consumed with a smooth cup, while carrying an acidic taste in the other cup.

The authors of the study said that these results indicate that the sensory experience affects judgment in basic tastes.

The study participants considered that the aftertaste of coffee in the jaw was drier in the rough cups compared to its taste in the smooth cup.