It sounds like you are looking for the bowl? I think a 18mm socket-to-plug adapter will work. I think that @4everpushingaboulder uses a two-sided bowl like this one:Still trying to get the TED Funnel. Does anyone know what the adapter on that one is called so I can look somewhere for it.
https://www.theroguewaxworks.com/collections/glass/products/g07-18mm-2-sided-bowl