Answer:
What is black when you buy it, red when you use it, and gray when you throw it away?
What is black when it's clean and white when it's dirty?
Lighter than what I am made of. More of me is hidden than seen. What am I?
I have married many women but have never been married. What am I?
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.