M&S ones still do, had one the other night as the Great British bake off reminded me they exist.
My only experience of warm squash was at Sunday school in the 1980s when I was given orange squash with water from one of those water boiler tank things. Looking back I guess it was because the water was a bit dodgy out the tap so it was deemed cleaner after a boiling process. It didn’t taste nice either way. A diacalm sachet dissolved with boiler water reminded me of it some ten years later.