Tell me about this puke can

Mr. Gasket aluminum puke can. Listed as "recirculating" so that seems to mean it's a recovery tank.
Mr. Gasket 9135

Here it is with the lid off. I'm not sure how it can "recover" coolant back into the radiator. I THOUGHT a recovery tank had to have a tube on the lid going to the bottom of the can, but what the heck do I know?
View attachment 1715891058
The 90 degree fitting on the outside needs a matching drop tube on the inside going to the bottom. If it has that, then it'll recirc :)