Use a key as a shopping cart chip
Anyone who has forgotten any change or the shopping cart chip can alternatively use a key.
A few days ago my sister who works in a supermarket told me that there are some customers who use her key for this and of course I had to test if this really works and yes it worked perfectly.
The key is not fixed, can be super remove again, a great alternative. Of course you should not forget to push the car back, but you always do that anyway. I'll put an old key in my pocket just in case, you never know when the chip will be lost and you will not have change.
