Mike Lyle wrote:
Rusty Hinge wrote:

Half a pint of milk a day? You make tea for the firm? A pint generally
lasts me a week to ten days.

I'd have expected Rusty to come up with an ingenious suggestion
involving the passive use of latent heat of vaporisation. Wouldn't a
bot. of milk last in most weathers if draped with a wet cloth?

Yes, but not long, though.

Or maybe
covered with an upside-down trerracotta pot standing in water (mimicking
a purpose-made thing one used to be able to buy*);

You still can.

or in an old-fangled
meat safe. For their holiday caravan my parents had a neat variation on
the "Koolgardie Safe": an "Osokool", which was a little metal cupboard
clad, it seemed, with plaster of Paris, with a shallow depression in the
top which one filled with water.

*On reflection, you might well find one in one of the junk shops now
self-styled "antique shops".

We had an Osocool at the chalet in East Mersea. Better than nothing, but
not a patch on an eclectic refrigerator.

Or even a gas one.

A very well-kitted neighbour had a thermosyphon one which ran on paraffin.

--
Rusty