Not that I am pushing one company over the other but I think the Walmart Bags are trash. We actually gave ours away. They are light weight and fall over just like the plastic counterparts.
The ones I find to be the best are the ones that Meijer sells. The cost is 99 cents and the are so good we use them for day trips, grocery trips and traveling (we always take our own food rather than restaurants).
Totes from other stores are just that totes. They are okay for carrying books to the library, etc. but groceries, no.