I checked the giant tub of Peter Pan I picked up at Sam's a couple of months ago and it too has the 2111 code on it. I use this pb when I give my dogs, Gaston and Zorro, their pills each day. I also use it as a treat for my rabbit, Marconi, and my guinea pig, Watson. Thankfully, all the animals are well but I guess I need to toss the tub. I wonder how one goes about asking for a refund on a large tub? The code is not stamped on the lid but on the canister itself.