Answer:
My first half means container. Not a lot of people understand my language.
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
It flies around all day but never goes anywhere? What is it?
I mirror your actions.
I am used to bat with, yet I never get a hit. I am near a ball, yet never thrown. What am I?
What is lighter than what it is made of?