Disregard this thread, I’m dumb.
- Place a barrel / drum on top of the Ender Garbage Bin.
- Set the barrel / drum to output to tanks vertically above / beneath it.
- Attach a Tiny Funnel to the side / top of the barrel / drum.
- Empty your fluid container into the Tiny Funnel. The fluid goes into the barrel / drum, then is immediately transferred into the Ender Garbage Bin and disposed of.