A cohort of immaculately made-up housewives sit around a wallpapered parlour as a Tupperware container of grape juice is thrown across the room.
It's a strange image, but it's just one example of the many demonstrations that took place in American living rooms and patios throughout the 1950s and '60s. Later, an in-house Tupperware seller would take orders for the new plastic storage containers that seemed miraculously water-tight.