The worlds biggest wall? The worlds highest building? The worlds tallest man? Heard of those?
We built the worlds biggest iPod speaker.
Now for all you people working in retail: try the "worlds most expensive". Worlds most expensive car, worlds most expensive hotel, worlds most expensive drink. The good thing about "biggest" or "most expensive" is that you don't have to sell one product before getting the attention of a record breaker.
Sometimes the code is not that difficult to crack.