Cool drinks in the sun
If you want to go to the lake in the summer & do not want to do without chilled drinks, you are usually faced with the problem of having to carry the large cooler with its rechargeable batteries - this is easier:
You pack a large towel (preferably black), which makes you dripping wet (for example, in the lake) and wrapped in several layers around the bottles to be cooled. The whole is then put IN the sun; Evaporates the water from the outermost layers of the towel, the temperature inside surprisingly lowers far below the ambient temperature!
Just try it!
