Since no one knew the answer to my question earlier about liquor being in another container than the original bottle, I called Disney today and asked. The person that I talked to said that the liquor must be in the ORIGINAL bottle and it must be SEALED or it won't go onboard with me. Looks like a trip to the liquor store is now on my agenda.
I didn't know the answer to your question, but it doesn't surprise me--they have the same rule for food that you bring on board .