Answer:
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
The more of me there is the less you see.
I am filled with garb the price is free. Just return what you don't need.
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
I'm many people's favorite place, even though many don't remember their stay. You'll love to come but hate to leave. If you get cold, use my sleeve. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.