Answer:
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
Although it sounds like I work on a transportation device I actually work in a restaurant.
There's a one-story house in which everything is green. Green walls green windows green doors. What color are the stairs?
You cannot keep me until you have given me. What am I?
The shorter I am the bigger I am.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.