The toilet is concealed under the passenger seat when not in use, taking up no legroom space, according to multiple reports. Waste is collected in a tank that must be emptied manually, similar to a caravan or motorhome toilet, and the toilet includes a fan and exhaust pipe to channel odors out of the car, multiple reports indicate. Seres has not confirmed if any of its cars will have toilets fitted as standard, and the toilet is still a prototype, according to multiple reports.
Professor Marie-Louise Danielsson-Tham is skeptical of the idea due to hygiene and practical challenges. The toilet has a rotating heating element to dry and evaporate urine and other waste, the company states. It remains unknown whether Seres will actually install these toilets as standard in any of its cars, how effective the odor control system will be in practice, and what regulatory approvals might be required.