Answer:
Six letters it contains. Take away the last and only twelve remains. What is the word?
I know a word of letters three. Add two and fewer there will be. What is the word?
My snake-like body cracks and burns. I cause pain but pleasure too. What am I?
I keep growing and am practically indestructible. I get eaten, but always come back. I survive cold and lie everywhere. You see me everyday. What am I?
I must be broken before you can use me.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.