Re: Small Chinese Funnel Bowl or Tangiers Small Funnel Bowl
The spire in the knock off funnels is often too tall and causes restriction of airflow.
Unknown glazes have given rise to rumors of unsafe products. No confirmation though. Just rumors thus far.
And the clay that is used in the Tangiers funnel absorbs and distributes heat better than whatever they use for the knock offs.
Some of them are thin cast ceramic also and thus the bottom opening is very large resulting in a difficult fit on many hookahs.