Although probably sold out in most places, you can buy a pair of Coca-cola speakers for $29.90 after buying two 500mL bottles of coke at 7-11.
However, in my opinion they are junk. The speakers look like a can of coke that splits into two halves revealing the speakers on the inside of each half. However, the three wires aren't stored in the enclosure, you have to carry them separately. The 3 wires plug in the front of the speakers and look ugly. Strike one.
The three wires are for USB power, connecting the audio-in, and connecting the left speaker to the right. Now you can put batteries in both halves, but I only tested the USB power situation. In this case only the left speaker produces sound. As you may observe, there is no cable providing power to the right speaker from the left unless it's possible to use the left channel of the wire to carry power. Strike two.
I tested 2 sets so it's unlikely to be bad luck, and more likely bad design.
In the advertising they put a MP3 logo and USB logo on the packaging. Besides being speakers, it has no MP3 functionality. And although they can be half-powered by USB, they are not USB speakers as no audio signal is transferred by USB. Strike three.
I'll give credit to 7-11 for giving me a no-fuss refund.
Sorry for being long winded but I saw someone auctioning them for $120. Buyer beware.