On Thu, 19 Oct 2006 19:21:02 GMT, Zane >
wrote:

>As an experiment, I kept an virtually-emptied bladder (a couple of
>ounces of wine still blocking the tap) around for a few weeks. After
>that time it had not had any additional air leakage into it that I
>could see. (Indeed, I couldn't see any air pockets at all. ) To
>verify that it wasn't just stuck to itself, I unblocked the tap and
>cracked it just a little and the bladder immediately started to fill
>with air and expand.

A few weeks would be OK. But try keeping a wine box for a few months
past it's "best before" date (which is usually quite short). You will
I bet find the wine noticably oxidised. But even then I doubt you
will find air pockets. After the bag has been used once, it will have
a few creases and cracks that will make it even worse a barrier to
oxygen.

That isn't to say that the idea of some suction device is not a good
one though. I believe such devices are available for purchase and
aimed at bars. They just use something more sophisticated than a wine
bag to contain the wine.

--
Steve Slatcher
http://pobox.com/~steve.slatcher