This is something that might actually enchant everybody watching: a video about a set of earphones that can change shape to perfectly fit your ears.
In fact, they can gain a shape and then change if you so wish. All you need to do is heat the nontoxic biodegradable thermoplastic mold and you're ready to go.
This is actually a pretty good idea, since earphones usually have the same shape, albeit being symmetrical opposites, and some customers might find one of them to be less of a good fit than the other.
The right and left ears aren't quite identical after all.
You can watch the video for a short walkthrough of how the Decibullz earphones work.
If you think they're awesome enough, you should be able to buy them for $39.99 / €39.99. The bundle includes a set of molds in 8 colors, an iPhone-compatible remote and a carrying case.