On the other hand,
since the bins are hollow and the lids aren't, they would probably have been made by two different processes - namely, blow moulding and injection moulding. Unless they're big names in the industry and have a lot of site space, plastics manufacturers generally do one or the other but not both.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Sun 26 Feb 2012, 17:20, 1 reply)

I believe they're both injection moulded
One of our local bin men explained it to me once. Just one of those things, I'm almost pathologically interested in learning about stuff I don't know about and he appeared to have an encyclopaedic knowledge of bins, bin lorries, compactors, macerators, ejectors and other such tools of the refuse-handling trade.

"You know so much about this stuff," I said, "how come you're not working in the depot instead of out here doing this?" as I helped him lob my old office desk into the back of the bin wagon.

"Work in an office?" he asked, incredulously, and tapped the Big Green Button on the control panel. He looked at me for a couple of seconds longer, and turned to look at the compactor as the lorry's 250 horsepower diesel shuddered under the load of two 10' long 9" diameter hydraulic rams smashing the steel-and-MDF desk to fragments just like you'd flatten a beer can.
"Why the fuck would I want to do that?"

Why indeed...?
(gordonjcp, Sun 26 Feb 2012, 18:22, closed)

Aye, and he probably made more money doing that job than he ever would have done in an office.

( The Mock TurtIe ™ --- Thinks you are a cunt, on, Sun 26 Feb 2012, 23:06, closed)