It's probably one of the most expensive ways to promote yourself we've ever seen, but there's no doubt that experimental musician Richard Eigner's music box business cards leave a lasting impression on whoever's lucky enough to receive one.
Created by Katharina Hölzl, the design was inspired by the musician's live shows which involve audience members joining the performance with music boxes of their own. And the 'cards' are actually long strips of folded paper that have been perforated with strategically-placed shapes. Not only do they spell out the group's name, they also play a custom composition on the included music box. Pretty awesome, but also pretty over-the-top when all someone asks for is Richard's email address.