🍺 The head of foam on a beer is important. Too much, and you're stuck with a mouth full of fluff. Too little, and you're wondering if the carbonation is correct.
Adding extra froth to your drink will bring out the true flavors and aerate the drink so that you can make use of the 80% of flavor triggered by smell.
In addition to this, MORE FOAM MEANS LESS BLOATING. By foaming the beer this cup will release more of the CO2 within the drink. This is what causes such serious bloating after drinking beer and other fizzy drinks.