In the ad, people can simply twist the modified can into two smaller cans, half the size of the original. From there, you share it with a friend.
Sort of warms the cockles of your heart, don’t it?
The concept, according to CNET, “originated with ad agency Ogilvy & Mather Singapore, though the group that came up with the idea has since left the company.” CNET also suggests the concept can probably won’t be mass produced for all markets. Cool idea, though.