Answer:
Many foods can make me strong but give me water and I won't last long.
What must you give before you can keep it?
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
Hot tempered and sometimes it blows its top, making a mess of everything.
Sometimes it's silver but also gold. Printed on paper it's a treasure to hold. What is it?
I always have to work with something in my eye. What am I?