Solved big problem
Most bags are made of a material that stretches when loaded.  These don't do this and are in that respect much stronger.  Plus you can see what's in them.  Can't buy in the typical grocery store.  Some have complained that there's no way to close the bag.  I just pull the top together and make a very strong closure.  Works great.  I'm going to these exclusively.
Rating: 5 stars