density - Is there any type of liquid, other than mercury, that PTFE teflon is known to "float" to the surface in?

The specific gravity of PTFE teflon is roughly 2.3. I have a 3/8" diameter sphere made up of entirely PTFE teflon, and I would like for it to float to the surface when dropped into a liquid.

Does anyone know of a liquid, other than mercury, that will allow this feat to be achievable?

(I prefer that the liquid be both non-toxic and inexpensive)