The Evac Optima 7 toilet is equipped with innovative vacuum technology. Thanks to the negative pressure created, only 1.2 liters of fresh water are needed for each flush. At the same time, this technology makes the design of sanitation facilities more flexible, because the toilet does not have to be installed directly above the waste water connection. Edges-free design, seamless construction and hidden fixings make cleaning easier. Antimicrobial surfaces can inhibit bacterial growth, thereby raising hygiene standards. case from the official website of the red dot, only for case sharing.