In a step that reflects a new trend towards intelligent response to user needs, the Chinese company “Serius” sparked widespread controversy among the automotive industry after submitting a patent application for a hidden toilet system integrated inside the car cabin.
This innovation is not just a funny idea, but rather represents a profound shift in design philosophy, as the competition is no longer limited to engine power or self-driving systems, but has extended to include the needs of the user inside the car and solving the problems of daily reality, most notably the “urgent need” during long trips or stifling traffic congestion.
Sirius and Huawei
Ceres, headquartered in Chongqing, China, is one of the most prominent emerging companies in the electric and hybrid car sector. What gives its innovations real weight is its strategic partnership with the technological giant Huawei.
This collaboration, which resulted in the “AITO” brand, combines Sirius’ superior manufacturing capabilities with Huawei’s digital and artificial intelligence systems.
From this standpoint, the innovation of the “built-in toilet” enhances the concept of the car as a smart “mobile home” that provides comprehensive solutions for its passengers.

Design engineering
The basic idea of the patent is based on intelligently exploiting unused spaces inside the cabin, as the toilet is integrated invisibly under the front passenger seat.
The operating mechanism includes:
- Sliding drawer structure: allows the unit to be pulled out with complete flexibility.
- Intelligent control: The toilet can be called manually or via voice command, maintaining the luxurious appearance of the cabin without affecting daily seating comfort.
Heat treatment techniques
“Series” did not stop at the limits of structural design, but rather provided an integrated system to ensure cleanliness and prevent odors within the closed environment of the cabin.
The system includes a dedicated fan to expel odors directly outside the vehicle, in addition to a built-in heating element that dries solid waste and vaporizes liquids to reduce their volume and facilitate handling.
As for the waste, it is collected in a detachable tank that can be emptied manually with ease, which makes the system practical and applicable in reality.

When do we use the “car toilet”?
The company confirms that this system is not intended for use while the car is in motion for safety reasons, but rather targets emergency stopping scenarios, such as remaining in traffic jams for hours, during camping trips, or in long queues at service stations, which gives travelers, especially families, children and the elderly, invaluable peace of mind.
Other options
While “Series” leads the revolution of integrated innovation that changes the appearance of the cabin interior, the markets are currently not devoid of practical solutions that meet the needs of travelers and provide them with instant comfort.
These solutions vary widely to suit different budgets and types of vehicles, starting from “Folding toilet”, and“Toilet with water tank”
Ceres’ innovation opens a new door to thinking about the future of cars, as it is no longer just a matter of moving from one point to another, but rather an integrated human experience.
Whether the consumer prefers advanced embedded systems or practical portable solutions, the established fact is that the automotive industry has officially begun to address the finer details of human comfort, whatever the nature of that need.