Answer:
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
What never asks questions but receives a lot of answers?
What is yours but only used by others?
Long and thin, red within, with a nail at the end.
It is where kings, queens, knights and bishops go to war together.
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?