Speaking of oil drains.
I came across a couple old 15 gallon solvent cans for parts washers with lids. I took one lid, drilled about 8 one quarter inch holes in it and beat it in a little with a hammer to make it concave.
I put it on a drum and use it for a teardown stand for motorcycle engines. All the fluids from the engine and cleaning solutions I use on the engine all drain down through the lid and into the drum.
When the drum is about 2/3 full, I swap drums and put on a sealed lid to transport it to the reclaim station.
Here's a pic (I hope) of a finished engine sitting on the drum. All the paint is gone off the lid now but maybe you can get my drift.