Everyone knows that caffeinated beverages will give you a small froth if you dump them in a glass. The Dutch apparently require a good a amount of froth in their beer. But at the same time Blue Gatorade has the same consistency as my pee, but my pee froths 10x as much when I shake a pee bottle. Why come?
In: Biology
Not mentioned yet is the presence of a surfactant (soap). This reduces surface tension and makes it easier for bubbles to form and remain. When combined with a blowing agent (carbonation), foam builds up.
Think of mixing soap and soda
[Foaming Agent](https://en.m.wikipedia.org/wiki/Foaming_agent)
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