At a supermarket you can buy nearly everything. Recently they started to sell these delicious triangular separators. Normally they lay between the customers at the cash register, but this one is made out of chocolate!
Some customers looked through the whole store to find something that matches theses separators, and while looking at the shelf with the sweets they found something and tested it right away.
Just put them as casual as possible onto the cash register and see what happens. At first the cashier doesn’t notice anything putting the strange separator aside. But at second glance she just has to smile.