Plus, every chain including Walmart sells polyester fabric shopping bags and encourages people to use them. Some stores even give nickel discounts for using "green" recyclable bags instead of paper or plastic.
I wouldnt put a whole lot of faith in those bags either.
I have had one of those bags that was only a few weeks old fail on me.
The threading on the handle was so weak that the handle just ripped off the bag. Fortunately my wife was carrying the bag at her side and the contents hit the ground and not her feet.
We have dozens of these bags, most of which were free or for less than a $1. For some reason my wife is pathological about using these bags, so we have several in each vehicle and on a hook by our house's door to the vehicles.
I tell the checkers at Walmart and other stores, they have to be able to lift the bags with their left hand except when they are left handed, then put it in the cart too keep them from overloading the bag. I never lift a bag off their stand, they have to lift it. We put all bags in a cart to minimize dropping them or their contents on the way to our vehicles.