Marian Loth

Photo of Marian Loth

Marian Loth

Sanitary researcher and designer

TU Delft, Faculty of Industrial Design Engineering

For her master’s graduation project Marian invented and designed a female urinal at the design department of sanitary ware company Sphinx in Maastricht. This experience stimulated her interest in human sanitation. Marian then became project and design manager of the ‘lady p.’ at Sphinx. The lady p. was launched at the ISH’99 Sanitation Fair in Frankfurt where it won the Design pl+s award and received worldwide media coverage. 

Marian was uniquely in the position to respond to the toilet-dilemma posed by Dutch railway company NS. Her PhD project in cooperation with TU Delft and the Dutch National Railways (NS) led to a new toilet design concept that is currently being implemented in NS intercity trains. 

In 2020, under the impetus of Covid-19, she was appointed member of the core team of the WTO compendium for the global standardisation of (transportation) toilets.



This is a summary of all the publications and media coverage (google my name Marian Loth), see pages 294-300 of the Doctoral thesis:

1/ Design for Sanitation-how does design influence train toilet hygiene?

2/ Appendix of Doctoral thesis: Design for Sanitation


3/ Research article: Hand luggage in the train toilet








7/ Mini-symposium Sanitation, Key-note: Jack Sim


8/ Radio Belgium


9/ The Icarus idea. Podcast: Marian Loth and the terrific toilet:



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