Advertising for Coca-Cola products lately have been more catering towards a younger audience who are fascinated by irony and sarcasm. This cup design does just that by creating an illusion of an old Coke bottle while actually being a modern, disposable drinking cup. This is similar to the idea behind memes and similar designed entertainment that is currently popular.
smart, green solution for business cards - honestly I don't like this so much for the "green" aspect of it as much as I like the idea that is different. It would definitely stand out among other people! But then again, I think like a business person and see competitive advantage. ;)