I thought that originally they cost 99p, but then mr Whippy, in his wisdome, decided to make them in different sizes, but you couldn't then have a 94 or 1.08 could you, so they were all called 99s, just small, medium and large.
What about 99 co op tea bags. 99 perferations i thought, but then my mom told me i was a dim wit, and from then on, i never had another thought of my own.
mmmmmmmmmmm
The 99 was invented by Cadbury's to increase chocolate sales. According to Cadbury the name came from Italy: "In the days of the monarchy in Italy the King has a specially chosen guard consisting of 99 men, and subsequently anything really special or first class was known as 99 � and that is how the 99 Flake came by its name.