> If there was a way to make the background have a IOR of that of the liquid 
> as
> opposed to 1, that might work, but it would cause other problems.  Not to
> mention I do not know if it is possible.

Don't know about the other issues but I am pretty sure that if you surround 
the scene (camera in particular) with an object you can use that to set your 
"background" ior. Something like:

plane {y, 100000
pigment {rgbt <1, 1, 1, 1>}
interior {ior 1.3}
}

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