The “Botijo” uses the same principle and has been in use for centuries in Spain to cool water.
The article mentions fragility, but I imagine that some open sided fiberglass cage or equivalent could be made. Fiberglass is fairly low tech nowadays, cheap and widely available even in the developing world.
Try octopuses. Essentially liquid. Think Odo from Startrek DS9. Watch them go from a beige cucumberish shape to a dark green/brown lump that looks like a jagged rock