Answer:
I am a word. I become longer when the third letter is removed. What am I?
I will disappear every time you say my name.
I climb higher as I get hotter. I can never escape from my crystal cage.
People need me yet they give me away every day.
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.