While I don’t know how good the sound is from this little card-case speaker from Japan is, it certainly looks nice. You’ll be able to carry around a speaker in your pocket. Since they look pretty trendy, you can imagine that you’ll end up paying a premium for it, though.
The pocket-size speaker has a built-in rechargeable battery which takes 2 hours to charge up via USB cable, and it will last you 5 hours of playing time. It comes in three color variations: silver, gold, and black. It looks extremely simple, yet well put together.
You can get this portable speaker for around $65 (USD). Since they’re a Japanese import, it’s not too easy to find them, but you can head over here for a few different shops that stock these. Whether or not they’ll ship to the US is another problem.