After the reread, it seems both shadow and living doll might be the same person begins with. I judge from how their memories start anyway.
Their inner personality is shadow and their front personality is face. Something like that.
There is a lot of info in this chapter.
Personally, I think that coffee bottles might be from star bearers themsleves. It's not a new one from Grandfather, that is for sure. If they know ability to control, they should have know how to do it as well.