Answer:
A hill full, a hole full, yet you cannot catch a bowl full.
What can be filled with empty hands?
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
Long and think, red within, with a nail at the end.
What surrounds the world, yet dwells within a thimble?
Brings the sky a lot closer.