It could be also a funny (although more expensive) idea to buy 100 of these things and bring a new one whenever you go to the store. So the deviders suddenly won’t fit anymore in that little rail and the cashiers will go crazy how this is randomly happening every couple of days.
This would work. I work in a new grocery store and we have enough to fit… they are barely contained. If there were suddenly more of them I wouldn’t know what to do.