Answer:
I am the kind of soda you must not drink.
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
I have a neck but no head arms but no hands. What am I?
What room do ghosts avoid?
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.