Here in Germany, you have to collect a "Glaspfand" or "glass deposit" in English. I'm not sure if this is the proper wording.
1 pcs. honey (500g) for 6€
+1 pcs. glass deposit for 0.5€
When the customer ate all the honey he will bring back the glass to me and I will refund him the deposit.
I tried to do this by setting up a "glass deposit" article with a negative price like "-0.5" but the backend will not accept this.
A workaround with the current deposit system is not possible because:
Customers may bring back glasses from other beekeepers and get the deposit. So I have no customer record and no received deposit in the past, I can refund. I want just to "buy the glass from the customer" (article with negative price)
It is not common here to ask peoples names when they buy a glass of honey for 6€ so it is not really feasible to create customer records.
I tried to create a discount without a predefined value and add the value at checkout. But this will not allow for a negative total on the bill too.
A workaround with the UOM system does not work because you cannot enter negative values for the amount in the POS app.
Any more Ideas how to solve this? I'd really love to use loyverse - I like the app very much.