Answer:
What contains zero calories, but if you consume it, you will probably gain weight?
I have one eye. See near and far. I hold the moments you treasure and the things that make you weep.
What do you throw out to use and take in when you're done?
What can be filled with empty hands?
What is red and nailed to a wall?
What did the piece of wood say when he saw the screwdriver and screws approaching?