Answer:
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes.
Born of earth, but with none of its strength. Molded by flame, but with none of its power. Shaped
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
The warmer I am the fresher I am.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?