What fluid is in the Metallic Astro?

[Mel]

Hey folks, does anyone know what fluid is in the metallic Astro bottles? I know its Propylane Glycol in the baby astro metallics, just wondered if its the same in an Astro.

[Tim Gill]

I know that the glitter babies are just PG and if that's the same in the baby astros then it would be the same for the astro but i don't think its only PG for the metallics probably closer to the lava formula but that is just my guess.

[Carol]

Ancient trade company secret I presume............