Answer:
What can you catch but not throw?
I am seen in the water. If seen in the sky I am in the rainbow a jay's feather and lapis lazuli.
Drop me and the world will shatter. You can always find me where you empty your bladder.
You do not want me when you donβt have me but when you have me you don't want to lose me.
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.