Answer:
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
Break it and it is better, immediately set and harder to break again.
What goes through the door without pinching itself? What sits on the stove without burning itself? What sits on the table and is not ashamed?
I don't think or eat or slumber. Or move around or fear thunder. Just like you I look the same but I can't harm you or be your bane.
You use it between your head and your toes, the more it works the thinner it grows.