Recycled Plastic Bag

In an effort to be less wasteful, I'm interested in ways to re-use/recycle items at home. By using my own cloth bags at stores, I've reduced the amount of plastic and paper in our bag pile. That's fine, but, as a knitter, I want to go a step further and make something out of it. I can't help wanting to turn those plastic bags into something useful, other than garbage bags. Recently, I came across the Re-bag pattern by Cocoknits. It's a knit tote bag made out of chopped up plastic bags. It's a great idea, and she includes a tutorial on how to turn the plastic bags into yarn. Looks cool and crafty! I wonder how sturdy it is?