The Throne, a mobile toilet cubicle designed by Spanish studio Nagami for the To.org foundation, was 3D-printed with a filament made of plastic medical equipment waste from hospitals across Europe. (Courtesy of To.org)

The portable toilet consists of three parts, including a teardrop-shaped body, a double-curved sliding door and a collection bucket for solid waste.  (Courtesy of To.org)

The toilet is equipped with an off-the-shelf separation toilet seat, which diverts the urine while the solids are composted to use locally as a fertilizer.

To prevent the accumulation of dirt and bacteria, Nagami had to avoid the use of 3D printing for the actual toilet seat, as the process creates distinctive grooves rather than a smooth hygienic finish. The team, therefore, decided to incorporate an off-the-shelf compost toilet instead. (Courtesy of To.org)

The first prototype, which is currently being trialed on a building site in the Swiss Alps, was produced by an advanced seven-axis robotic printer in Nagami's studio in Avila. Hopefully, this process for 3D-printing complex structures with recycled plastic could eventually be adopted using more readily available local technology. (Courtesy of To.org)

Nagami created The Throne by sourcing a filament made from recycled plastic medical trays. A number of mechanical elements such as metal rails are inserted into the frame for fitting with the sliding door. (Courtesy of To.org)

Over 90% of all plastic waste produced by far is still waiting to be recycled. To.org, a hybrid between a charitable foundation and a venture capital fund, said the abundant material could help create accessible and affordable sanitation and shelter where they are needed most. (Courtesy of To.org)