Missouri Quilt Company with Jenny and Vanessa back in January 2015.
Followed their tutorial using a stashed jelly roll and few of the other stashed 2.5" strips.
http://quiltingtutorials.com/browse-by-skill-level/beginner-quilting-tutorials/improv-tote/
The only thing I would change for the next bag is to put some kind of loop closure on the top.