_cool box 

  Like more and more products this cool box uses the sun as its energy source.   Tourists can rent it and use it for long walks in the forest or for a day on the beach.   The sun panel can be moved so that the cool box is always provided with sun energy.   You can put the handle in two positions. The pull-position is especially convenient   when you have to transport the box up the stairs or over a sandy soil. Furthermore,     the cool box is easily folded into a compact_package, which fits in the back of a car.