Note there are several implementations of the concept of deposits with varying degrees of complexity:

- `product_packaging_container_deposit <https://odoo-community.org/shop/product-packaging-container-deposit-715405>`_
- `pos_product_pack <https://odoo-community.org/shop/pos-product-pack-716088>`_

This module focusses on simplicity for users who don't want to get into packaging.
