To configure this module, you need to go to *Point of Sale > Products*.

#. Select or add at least one 'deposit product', such as 'Bottle 1L',
   with a non-zero price and with the checkbox 'Is Deposit' set to True.

#. Select or add at least one product of which 'Use Deposit' is checked,
   such as '1 liter of cola'. In the accompanying product selection field,
   select the bottle. The two products are now linked.
