Akuperma, shoplifting?! Theft??!! there is not even the shadow of shoplifting. The clerk gave an extra lid which passed unnoticed, or at least, so thinks TheBearIsBack. The OP doesn’t even care for the lid, but it’s now in his possession. He is totally willing to give it back in the case it’s proper to do so (suppose a very contrived scenario in which the lid is really owned by a yid who did not give up on it and it ended up there?) He is willing to give it back to the nonjew if appropriate. BUT, what you probably don’t realize is that, if he does want to give it back (say he wants to show the shop what a Yid is like and make a kiddush Hashem) it’s not just a matter of a few seconds or a few cents, here is what likely he has to do. Go to the closest internet cafe, open some random webpage, ask around who speaks some english. Ask who is willing to do you a favour, and request that they write “Dear shop owner, this was in my bag by mistake, I only realized at home. I did not use, is clean. I return. Pleasure to buy at your shop. Thank you.” Make sure they understand what you have told them. Take the paper and thank for their bother, and pay something to the boy. Pay the internet shop for the service you did not want nor care for. Go to the shop with your piece of paper, go to the cashier and hand out the lid and the paper. Watch the employee call someone else to make sure they understood and watch the three or four of them discuss (in the meanwhile, unpaid time flies). And then who knows? May be it turns out that there is a SPECIAL, buy large container with lid, get small lid for free, the lids which were unavailable the previous month and customers were mad, so the manager suggested “special offer”!!!
OK if someone wants to do – fine – but I don’t think you can say that keeping the lid amounts to shoplifting.
TheBearIsBack please explain what is a yukel. I’d keep the lid and enjoy it.