Answer:
It's tough as nails, Or soft as snow. People use it for their rink, Some just put in their drink.
Four kings of whom I am one lord. Often on deck but never on board. Though I have a large heart, I am always seen at war. During which I always wear a suit, but never a suit of armor. Who or what am I?
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
A red house is made out of red bricks. A blue house is made out of blue bricks. What is a green house made out of?
With sharp edged wit and pointed poise. It can settle disputes without making a noise.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?