I have seen them used often for BP's, but I just wanted a little confirmation that they are truly safe enough to do the job. Yep, I'm talking about chicken incubators for a BP clutch.

And should a "tub" or tupperware container be used within the chicken incubator including the vermiculite, or is using no container and laying them directly in the chicken incubator just fine?

One that looks a lot like...