Fizz-Beer

Fizz-Beer, also known as Fizz-Brew, is a sweet drink that exists on Earth-1. A variant of Root Beer, it produces more fizz and foam than most root beers do, from which it derives its name. Usually extremely sugary, the drink is incredibly popular, and exists in multiple flavors.

Trivia

 * The drink serving as a fictional stand-in for a popular real-life sugary drink is similar to the Fallout series' Nuka-Cola drinks that serve as a stand-in for Coca-Cola.
 * It is also similar to The Simpson's "Duff Beer", including having some similarly named variants.
 * Known variants of Fizz-Beer besides the default include "Diet", "Vanilla", "Grape", and an alcoholic variant.