We salute you, Harris Teeter grocery store clerk. On Saturday, I passed over my single reusable bag and said, "If you need a second bag, paper please."
He looked back at me with a glint in his eye that said, "Oh, no. We won't be needing a second bag."
He packed the reusable bag perfectly, condensing an entire basket (including a half gallon of milk and three quarts of ice cream) into one bag. Sure, it weighed about 80 pounds and I could barely carry it home, but there was a paper bag to be saved! Job well done, Mr. Expert Grocery Bag Packer.