Packing Light for on the Go Collage Work

Don't get me wrong, I love my Eagle Creek pack-it cube for collage and art supply storage. However, for the times when you need a whole lot less, a small bag with a closure works perfectly. 

Yes, I folded some papers and the pen is there for scale, but it's what works for me. Throw a ziploc bag, a small journal and markers and you can make your work more portable and easier to manage...

How do you store your on the go collage material?