Answer:
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
Without coolant, you'll have some trouble with this.
What shoes should you wear when your basement is flooded?
You are owed one of these when someone wrongs you
What do we see every day, kings see rarely, and God never sees?
I break away from my pack. I create holes in my victims. I can travel for miles and then disappear. I am part of a dying breed. What am I?