Answer:
What can go up but never come down?
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
I can be found in seconds, minutes and centuries, but not in days, years or decades.
Goliath, The Jolly Green and Andre are all examples of this.
Nothing specific, but more than a few. This many clustered, together will do.
It is something you will never see again.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?