Flying

On reflection it seems quite obvious how the mushroom soup leaked. The pressure in the cabin was much lower than the pressure in the soup container.

Over the years cabin pressures have been gradually reduced without consulting the passengers, and who can doubt that in these days of high fuel prices they will be reduced even further (and perhaps already have been).

I would happily pay extra for a flight which had proper cabin pressure; the enhanced comfort and lower soup risk mitigating the environmental effects.

Incidentally a pilot once told me that the way they used to check the fuselage of the plane for leaks was to search for brown stains, where the nicotine had escaped. Alas now that smoking is not allowed....