Answer:
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
The more there is the less you see.
The more you take of me the more you leave behind.
I hop around and deliver eggs at Easter.
You use a knife to slice my head but you weep beside me when I am dead
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.