Looking to pick up a used one somewhere. One of the large cube plastic containers/carboy that are for liquid storage(with or without metal cage exterior. Don’t know what they are properly called to search for them. Or if they come different sizes???

IBC totes is what I think you are asking about.

https://www.ibctanks.com/

I know what you're talking about. My company just gave a bunch away to employees that wanted them. I forgot what they are called. Check your local recycle/dump/scrap yard.....what are you using it for? I wanted one but many had nasty chemicals in them. Even after washed, I didn't trust them for my use.

facebook market place usually has quite a few

There's 2 sizes, look for a food grade one....I see them on FB marketplace anywhere from 50 to 100 bucks...

Yes .those are the ones I'm talking about. .I must have been typing when you responded.

I have at least 4 you can have for free if you want to come to Iowa to get them

Farm supply places and farms have them here but like said most would be toxic for most home uses. The last 2 I had were full of fish oil they went to the Rez for a DIY septic tank system. I’d definitely go food grade no matter what.