Answer:
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I am Invisible Man's drink at snack time
I can go through glass without breaking it. What am I?
What is shaped like a box, has no feet, and runs up and down?
The Titanic is still here. What am I?
It is an insect, and the first part of its name is the name of another insect. What is it?