What's in the bag, you ask? A very collapsible hydro system!
Seriously the ENTIRE THING is contained in one backpack, one 5-gallon pail, and a snowboard bag. I wish I could find my snowboard bag to demonstrate but I think I left it in Alaska.

Shown is the system collapsed- all tubing, pump, emitters, and pots fit in the backpack. The hydroton exactly fills the 5 gallon pail. All you need is something to put it on and a light source and off ya go...