[Karren H]

Initially I tried funnels but they were problematic.  The pressure changes depending on which part of the cone you fit in.   So I moved to PVC pipe and fish bowls.   I am using one of my PVC pipe units as i type.  The nice thing about PVC pipe is you can get it at any store.  I use mainly the 4" caps and some connectors.  sometimes a couple 90 degree elbows together.  

Here is a post I wrote on a bondage forum....  https://forum.boundanna.net/board/viewtopic.php?f=12&t=13374

Here's one about fish bowls on the other Breast nexus - https://www.breastnexus.com/showthread.php?tid=27203

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