I couldn't do without my waste oil caddy! Acquiring mine has a funny story......I was working at a shop that had several of them & a "new" mechanic didn't really know how to empty them, He strung a air hose all the way out to bulk storage tanks & hooked up the caddy. But he didn't secure the discharge hose, just slipped it on the discharge port & of course it popped off.
Oil shot up in the air probably 20 feet, Covering him & everything around the bulk tanks in used oil.....One of the funnest things I've ever seen in my life!! We called him Jed Clampett after that because he "Struck Oil"!
He somehow convinced the owner that the caddy was at fault & they were going to throw it away, It got put in the back of my truck & been using it for years!
For storage.....I have a 275 gallon composite bulk container, They last @ 5-7 years in the Texas sun before getting brittle. Reconditioned ones are dirt cheap ($50-$75) & are reasonable to get pumped out.
The one one the right is for antifreeze.
When it's EOL.....I put the empty container on the curb & a "scrapper" will pick it up for the steel frame.