Public toilets – especially those in parks – have two main concerns: first, whether they are clean inside, and second, whether anyone might be hiding inside. To address these concerns, we proposed a transparent toilet that allows these two points to be checked before one enters. The transparent walls reveal the interior, enabling users to confirm its cleanliness and whether anyone is inside. This visibility also encourages people to keep the facility tidy. The glass is made of instant dimmable glass that turns opaque when the door is locked, ensuring privacy while making it immediately clear from the outside that the toilet is in use. At night, the toilet glows like a beautiful lantern, softly illuminating the park.
