Back in my day, the downstairs boys' bathroom (and indeed the pupils' bathroom in Glion) were fitted with Provendi soaps. These were large yellow balls of soap, bolted onto a rod protruding from the wall. Having never seen them before in any other contexts, we all thought they were hilarious.
It turns out they were quite popular in French and Swiss-French schools from the 1950s to the 1990s (no surprises then that Hill House kept them going), and indeed you can still buy them today. I have one fitted in my bathroom at home (in the traditional Hill House lemon scent, of course).
Occasionally Giacomo would see them in shops when he visited the south of France, although I never had one of my own until 2025, when I found a shop whilst on holiday Paris where they were sold. The smell immediately brought me back to my days at Hill House, and indeed it still does whenever I wash my hands.
Sadly the government recently banned solid soaps from non-domestic buildings (which seems odd, to me - given that soap is a famously self-cleaning substance). Future generations of HH pupils will sadly no longer experience the joy of seeing a fresh new soap fitted to the wall...