Is this what your looking for?

A simple cylinder shrunk down in 2 dimensions and extending it in the 3rd. Give it the preset of sub-surface scattering 'Lava Lamp' shader, then tweaking the transparent a bit, then tweaking the color to suit. Adding Anything Glows (included with more recent versions of Carrara,) and setting the Scene to have both a 3D Aura and Glare effects.

Hope this helps! :D