I tried water and that wasn’t it. I now have unbuoyant blobs!
This probably has everything you wanted to know, plus some. :) http://www.ehow.com/how_4523962_refill-liquid-lava-lamp.html
Sccrowell! We were just talking about you the other day… check your comments in a sec.
DrasticDreamer, I just wanted to say, thank you. ; )
@DrasticDreamer You stole my answer. Great reference