Not such shopping bags you used mostly only once for a few cents. These are gone for some years already. I think they are even illegal here now, not sure if EU law or more regional.
So, if you want a bag in from a store, it will be a more expensive and big and durable one.
For some fruits and vegetables... there are still some plastic bags, but I don't know how they are special.
Planning is the process of replacing chance with error.