The shower scene in Psycho is one of the most famous moments in movie history – and it gave Michael Bierut, partner at Pentagram, the perfect way to scare people into cutting their shower short: “Taking a brisk, water-efficient shower is the best way to start a productive day. And the most famous shower ever filmed was one that was notoriously interrupted. Had Janet Leigh been a bit quicker, she may have made it to the end of the movie!”

Cutting 2 minutes off your showering time will save 16,425 litres of water a year – and you’ll still smell just as fresh.

Learn more about how to shorten your shower or buy this poster from here.