Recycled Water = unlimited filtered shower water in a drought

Have you heard of a system for RV campers that lets the user take long showers using the same filtered water over & over? Has anyone heard of or used such a set up? Any recommendations?

Here's some of what I've found so far.
Loopz:
https://hamwells.com/en/loopz/

Overview of Our Recirculating Shower | RV Renovation Ryan & Su: https://www.youtube.com/watch?v=dhpBTra9bXs