It comes for free with the items inside, though most recycle me. Dioramas are made in me, things can be stored in me. What is this reused item, often repurposed?

What do Gungans store items within their homes? In

I slip through spaces, tight and small, Yet I am not a worm at all. I help keep teeth both clean and bright, by reaching spots beyond your sight.

I wear a coat of green armor but have no wars to fight.I drink deeply when it rains but can survive months without a sip.Touch me and I will bite, yet inside I hold a hidden well.

I attract metal without touching it and repel my own kind. I have two poles and no soul. I guide ships north in the dark. What am I