On Tue, 15 Dec 2009 00:02:28 +0000, fred wrote:

I still think it would only half deploy if used on its side (pressure
lost without expelling liquid once fluid dropped below the outlet).

It may not empty fully but it would certainly empty more than half as
the turbulence caused by the sudden pressure drop would cause more
than half the contents to be expelled when horizontal especially in a
fairly narrow container.