How to best setup and track returnable/reusable Totes in Manufacturing Process

All

We currently manufacture many molded sub assembly parts for our Finished good operations.  And in this process we use heavy duty reusable totes.  So we technically have an inventory constraint of how much we can make based on how many available totes we have.  And to further complicate this process our Design engineers have begun developing the packaging to support multiple molded parts.  So at any given time the same tote can be used for potentially 10 different items.  So how can we use this constraint and develop an appropriate tracking and planning for our sub assembly items?

Thanks

Justin