craftgrrl | Giant Mail Tube of Death

My dad is currently restoring a GTO, so he's constantly getting car parts in the mail. A couple of weeks ago, he received some in a huge tube. I stole the packaging because I thought it was a waste to throw it away. But now my mother is beginning to get antsy about it being in the house and I can't for the life of me think of what to do with it.

It's about as tall as me (approx. 5'2") and hollow. The cardboard is approx. .25" thick and the diameter of the tube is 4.5" -- 4.75". Both ends have white plastic caps (like the ones on smaller mail tubes). Any idea what I could use this for? It seems a pity just to throw it away.

Me & the tube.