There are two main reasons for this. For one, the foam itself tastes (and feels) good. Thick carbonation makes a beer taste creamy and rich, which are characteristics beer drinkers tend to appreciate.

Claudio Pellegrini, a professor of thermal and fluid sciences at the Federal University of São João del-Rei in Brazil, has calculated the optimal shape for a beer glass to keep the beer cold for ...

A large head was achieved by pouring the beer in an upright glass and encouraging excessive foaming. This technique dissipates the trapped CO 2 and brings positive flavour elements to the forefront.