If you want to get as much oil out of the vapour as possible, what's the best type of internal design for a breather tank?

I've seen some that are just an empty tank with hoses, which I really dont see the point of, some have a plate infront of the entry, some with multiple plates that make a maze for the air to travel round, others with a sort of gauze to trap the oil-droplets...

I want to have the vent to atmosphere, so want to get rid of as much oil as poss.

I'll have something made if theres nothing out there that will do the job.

All info welcome

Simon.