What is the BFG’s favorite fizzy drink in Roald Dahl’s novel?

The BFG’s favorite fizzy drink in Roald Dahl’s novel is Frobscottle.

Frobscottle is a fictional green beverage that appears in The BFG. Unlike ordinary fizzy drinks, its bubbles travel downward rather than upward, producing a comic effect that the giant calls a “whizzpopper.” The drink is one of the story’s many playful inventions.

The BFG introduces Frobscottle to Sophie after taking her from London to Giant Country. He also eats snozzcumbers, another fictional creation that he dislikes because they taste revolting. These invented foods help establish the BFG’s unusual world and Dahl’s distinctive wordplay.

Frobscottle is not the same thing as a snozzcumber. The first is a sweet, carbonated drink, while the second is a cucumber-like vegetable. The BFG’s speech also includes words from Gobblefunk, the inventive language associated with his character.