Answer:
Split me in half, and you get me and another me. What word am I?
What comes one time in today, three times in tomorrow and never in the future?
They can be long or short; they can be grown or bought; they can be painted or left bare; they can be round or square.
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it
It carries paper of the most important sort but also plastic, I'm glad to report. What is it?
What is always coming but never arrives?