[Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?

[vicky_molokh]

Originally Posted by Anthony

The amount of heat from water that is 12C cooler than you body temperature is just over 2% of the amount of heat you'll eliminate by sweating away the same amount of water, so in absolute terms it is not significant. However, it's cooling available exactly when you want it, and not subject to the limitations of sweat (which can shut down in cases of heatstroke).

The point seems to be that it's cooling cumulative with sweat-cooling, available as long as you can afford a +5% increase in water expenditure per day.