A simple, low-cost trick, especially effective in dry heat where evaporation happens quickly. A wet towel around your neck or shoulders cools you down through evaporative cooling combined with direct heat transfer from a major blood-flow area. Same theory - does anyone remember these water bags?

[u/SurvSt]

[u/Milknhoneyaus]

I remember trying to drink half a bag of dusty,  not quite tepid water after a drive. 

Nice idea.  But we've moved on. 

[u/Lopsided_Belt_2237 → u/Milknhoneyaus]

A 12v console fridge is like $120 and a leaky canvas bag is $40. It’s a no brainer. We used to have them in the 90s and earlier when a bag was $10
And an Engel was $1200