Old school coolers just ... As a bonus, this cooler has a feature many other competitors do not: a vacuum valve that allows you to suck the air out and improve the efficiency of the insulation.

Engineering students have been transforming the oldest form of air ... coolers from off-the-shelf parts in the school's workshop. The coolers work by the use of evaporation of tiny droplets of ...

old fan blade, a portable DC water pump and a few other spares, you too can build a good air cooler. While the cooler does not look as great, it is a nice DIY fun project for everyone to try.