Planck
believes in Dog
halocarbon vapor - Halocarbon compounds are chemicals in which one or more carbon atoms are linked by covalent bonds with one or more halogen atoms (fluorine, chlorine, bromine or iodine - group 17) resulting in the formation of organofluorine compounds, organochlorine compounds, organobromine compounds, and organoiodine compounds.Chlorine halocarbons are the most common and are called organochlorides. (wiki) aka not weed vapor.
But why? Glass is cheap safe and well suited to the purpose.