Retrofitting Cinderella Travel in an existing recreational vehicle can be both time consuming and costly, requiring in many cases, major interventions in the vehicle’s interior.Cinderella now provides an optional prefabricated Build-in-Box which offers a simpler alternative to integrating the toilet’s built-in part into walls and nearby cupboards. The built-in box helps reduce or eliminate the need for costly bespoke carpentry. The box is mounted on the existing wall and hides the toilet’s exhaust pipe and built-in parts.