£3.99 (PWR-1M-USB)
Buy HereIf you would like to power your bottle light (must have silver wire lights inside, not copper wire lights) from a USB port on either a USB battery pack (to make the lights portable) or directly from your computer, then this power lead is 1m long allows you to replace the 3 pin mains plug that is supplied with the lights.
You would need one of these cables for each bottle that you wish to power by USB.