Feature request: deposit on bottle and cans for recycling and reuse

[#1]

In Quebec as elsewhere in Canada we must apply a non-taxable deposit fee for the recycling and reuse of cans and bottles (beers, sodas, …) and soon wine bottles and many other types of containers.

We need either the ability to scan a barcode and in this single sweep to see the product (taxable) added to the purchase basket, and at the same time see the deposit fee on the can (non-taxable) added for each item.

I tried creating this as service fee, but we can't attach a service fee to an item and it be applied systematically. We have to add the service fee manually everytime, which is less efficient and can lead to errors and omissions.

Please and thank you!