Yesterday at the grocery store, I dropped a container of yogurt on the floor. It was one of those square-shaped containers with the foil tops. I asked Isaac to pick it up for me and he did, right away. I thought there was a good chance he'd puncture the foil top with his teeth, but figured I'd buy it anyway and just take it home and put it in another container if that happened. But he picked it up very carefully, very gently, and gave it to me without a tooth mark on it. Good job!