May 11, 2015 11:18 AM EDT

Ever wondered how astronauts go to the bathroom in space? You’re in luck: Astronaut Samantha Cristoforetti gives a tour of the International Space Station bathroom in a new video shared by the European Space Agency.

Watch as Cristoforetti, an Italian national who’s returning to Earth this week, explains how to use the high-tech zero gravity toilet — and how the crew’s urine is converted into drinking water.

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