Riddle Me This

This morning I read a clever riddle that I don't remember seeing or hearing before. I didn't solve it, yet the answer is obvious, once you know it. (The sign of a good riddle.) Here's the riddle:

The man who made it doesn't want it.

The man who bought it doesn't need it.

The man who needs it doesn't know it.

What is it?

Highlight the next line to see the answer.
A coffin or casket