Cool. I bought some glycerine a while back planning to make some tincture, but I never decided on a good recipe. This sounds good.

A few questions about the crock pot:

I have one with High and Low settings, not a temperature scale. Do you have a recommendation?

Also, can I put the contents in a pyrex measuring cup and just set that in the crock pot? I would probably make 1/8 batch the first time, and I don't think I want to try to retrieve an ounce of liquid out of the bottom of a big crock pot. I was under the impression that a crock pot needs to be relatively full to work properly, and that is why I am wondering if it would work to just set the cup in there.