ATLANTA – No one is better than Coca-Cola at having all of its communications, down to the very packaging, embody the brand promise of happiness and sharing, according to a write-up in Ad Week, for their “Ad of the Day” feature.

Leo Burnett in Colombia had the latest clever idea in that department, dreaming up a design for Coke's plastic bottles featuring a cap that could only be opened when fit together with another bottle's cap and twisted. Thus, you have to pair off to be refreshed.

To show off the design, the brand found people in most desperate need of a little friendly conversation, who are also generally not opposed to pairing off: college freshmen at the beginning of the school year. It put a stash of the bottles on a campus and observed as students had to partner with someone if they wanted to open their soda.