Answer:
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
I am a box that holds keys without locks, yet they can unlock your soul.
With head without hair. With mouth without tooth.
What comes once in a minute, twice in a moment, but never in a thousand years?
Special abilities and brightly colored underwear are all you need to be one of these.