Can you conquer the world by selling only one product? Many companies start small, focusing their energies on a single item, with plans to expand into other areas once the business takes off. But not everyone wants to diversify. Some prefer to do one thing and do it well, rather than risk diluting the brand and perhaps also the quality of the goods. In this edition of The Bottom Line, Evan Davis talks to three companies that have stuck with the core product that made them a success in the first place. They'll discuss the benefits of keeping focused, the challenges of staying ahead of the game and explore the perils of relying on just one source of income. Does it make good business sense to put all your eggs in one basket?

Guests:

Vince Gunn, Managing Director, Crocs Europe

Carolyn Komminsk, Head of Creative, Maclaren

Bill Noble, Managing Director, WD40 Company

Producer: Sally Abrahams.