Question: How can I reinforce my reusable grocery bag so it doesn't break at the bottom?

  Options: 
 A. Use a scrap piece of plywood lying around your workshop and cut it to the measurements of the base of your reusable grocery bag replace the thin plastic insert (so prone to cracking and splitting) with the measured and cut a piece of plywood and place it in the bottom of your reusable grocery bag.
 B. Use a scrap piece of drywall lying around your workshop and cut it to the measurements of the base of your reusable grocery bag replace the thin plastic insert (so prone to cracking and splitting) with the measured and cut a piece of drywall and place it in the bottom of your reusable grocery bag.
Answer: A