I would say enough nice ones for a weekly grocery haul. For two people, 5-6 would be enough. Put them in you car so you actually use them. As many as you would ever need for one shopping trip plus 2 spares.
People Also Ask
I recommend keeping four to five of the thicker reusable grocery bags, two insulated bags for cold items, and definitely no more than five of the fabric/cotton totes, she says.