What does "vapour-distilled" really mean?

Advertisement for smartwater, Vancouver, BC

I saw this advertisement on a bus shelter in downtown Vancouver. I was intrigued by the term "vapour-distilled" decided to look into this product a bit more.

Well, I should have known. This is a product from Coca-Cola. Its is just plain tap water that has been tarted up a bit.

"glacéau smartwater is inspired by the way mother nature makes water, known as the hydrologic cycle.  we simulate this process by vapor distilling water, making every drop as pure as the very first drop of rain (before it passes through pollutants, of course).  if that’s not smart enough, we then one-up mother nature by adding in electrolytes for a clean crisp taste.   if that sounds like genius, it is.  smartwater is smart because it’s made that way."
Source: http://www.coca-colacompany.com/brands/product-description#glacéau smartwater

So it look fancy, clean and pure, but it is just plain tap water that has been subject to a large-scale industrial boil and condense process. The smartest thing about "smartwater" is how the true nature of the product is disguised.

By one estimate that I saw a few years ago, bottled water sells for 10,000 times more than the tap water that is its raw material. Now that's smart!