If you think the personalized name bottles by Coca-Cola were impressive, have a look at what they did for Diet Coke. The latest campaign printed two million completely unique bottle labels. While this alone is impressive, so is the fact that they were created using a special algorithm allowing the designs to be completely auto-generated.
Absolut Vodka had a similar campaign in 2012 and Budwiser Beer just recently launched one of a kind bottles for a music festival in the US.
http://www.adweek.com/adfreak/diet-coke-prints-2-million-unique-labels-latest-stroke-packaging-genius-161042