Allen, whatever you have on hand that can hold the fluids will work just fine. I use two restaurant bus tubs that I picked up at Sam’s Club. They’re pretty common, and having a couple lets me swap them out as one fills up. For oil filters, I drop them into a five-gallon bucket lined with newspaper to minimize splashing. While there are more specialized tools available for fluid collection, these bus tubs have served me well for years.
And remember, Allen, focus on the bus first and then deal with the other details. Enjoy the process of looking around!