This bag is specially designed for picnic and other open-air events. The gadget includes a refrigerator with a volume of about 15 liters, a solar panel supplying it and two speakers to which you can connect a phone or mp3 player through a standard connector. In addition, a backpack due to the same solar cells can work as a charger for a phone or player.
Picnic Plus Cooladio Solar Cooler is here for sale and costs $ 85.