Answer:
George, Helen, and Steve are drinking coffee. Bert, Karen, and Dave are drinking soda. Is Elizabeth drinking coffee or soda?
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
My teeth are sharp, my back is straight, to cut things up it is my fate.
Long legs, crooked thighs, little head, and no eyes.
White bird, featherless, flying out of paradise. Flying over sea and land. Dying in my hand.
People take me on walks and I run and have fun. What am I?