Million dollar idea: The Tetra Pak
Media playback is unsupported on your device
Video

How the Tetra Pak became a million dollar idea

Tetra Paks - those reinforced paper cartons that are used in their billions the world over for milk, juices and soups - who came up with them?

And how did they get their deceptively simple design?

Video journalist: Jeremy Howell

Go to next video: Million dollar idea: The Slinky