New Coke was a failure from the start in 1985. People complained about the new recipe. So, Coca-Cola quickly re-released "Coke Classic." And, New Coke was dropped soon after.

Why didn't New Coke succeed? Perhaps, because of brand loyalty. Advertisers try to get people to stick with a certain brand, and people were loyal to the old Coke. Even kids as young as two develop "brand loyalty."

What about Mountain Dew Code Red or Pepsi Blue? Will they last?