That other thread about school milk (vom) and a biscuit prompted me to ask if anyone who was at primary school in the late '70s, got a visit from a "dental person" once a week with mouthwash? She came into our class with a huge bottle and we all got a small plastic cupful from her pump dispenser. I can remember her coming in and the taste of the mouthwash, and I have a vague recollection of us spitting it into a communal bucket... (Is that too disgusting, even for the 70s?)
DH is the same age as me, and I think in these days both our schools would have been in Strathclyde Region, but he has no recollection.