Practical rechargeable LED cork for empty bottle variable lighting lamp

According to science and technology blog Gizmodo article, the winter is about to pass, and then a few months, we can do a dinner on their own open-air balcony, ready to work from the purchase of the cork with LED lights began. The cork is priced at $15, and it's easy to turn into an empty wine bottle that you've stocked up for a whole winter.

Pull out the top of the cork, and you will see a standard USB interface that can be connected to an AC power adapter or computer. Simply reverse the cork, you can achieve the LED lights on or off. Charging an hour to ensure that it continues to shine for about 2.5 hours, just to ensure a dinner time. Of course, when it is not enough electricity, but also a clever reminder of the guests: we should go back to their homes.