Alright, here's the deal: I found the first 40 episodes of InuYasha online for free, and there are more added every day! Now, I could post the link to them, but that would be too easy. Thus, we'll make a game out of it! I'll post a riddle, then you reply with your answer. It must be correct, and you must not have heard it before. If you have, please don't be a slimy bastard and wait untill I post one you haven't heard already. If you get it right, I'll reply with another riddle and PM you the link to the episodes. Any questions, feel free to ask. First riddle:

We are very tiny creatures,
each of us have different features.
One of us in glass is set.
Another you will find in jet.
Another you will find in tin,
and a fourth is boxed within.
If the fifth you must pursue,
it cannot escape from you.
What are we?

Reply with your answer.