Earlier in the year, a woman in Switzerland posted a tweet after using a female pissoir in a theatre in Winterthur, which is in Zurich canton.
She said she'd "tried and tested" the novel facility, adding: "That is something".
But she did add the hashtags "fail" and "Hifle" (help) to her tongue-in-cheek post.
Meanwhile Professor Mete Demiriz of Gelsenkirchen University said that because women often flush the loo three times during a visit, gender-neutral urinals could save water.
He told the website jetzt that a design team of his is working on a pissoir with a cubicle and a door.
It is also lower down and allows the woman to have her back against the wall.