I can still remember a time when the best portable cool boxes were little more than glorified plastic tubs with a bag of melting ice thrown in. Of course, this method of cooling is still extremely popular, as evidenced by the rise of YETI and other cool box manufacturers.
But when it comes to the end of day two and the ice has disappeared, the milk’s turning to yoghurt and your drinks no longer have that refreshing icy-cold punch, you’ll wish you’d bought a proper compressor fridge/freezer instead.
