Answer:
Casper was a friendly one and Demi Moore made a clay pot with one.
If you are unsure how to use one then just ask a flight attendant.
It comes from crystal and melts to a treat. Add it to your tea to make it sweet. What is it?
What has a ring but no fingers?
You can break it or drink water from it.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.