Hands up who else would happily invest in this wonderfully wavy 1960s sofa by Italian design collective Archizoom. Dubbed the Superonda, it was one of the first couches to reject a conventional frame, made instead from a “polyurethane block cut into two parts with an S-shaped incision, which can be interlocked and stacked to produce different configurations”. The cover meanwhile is made from a shiny leatherette, completing the Pop effect. It is intended to “stimulate the creativity and fantasy of the user”, writes Italian design company Poltronova, for whom the Superonda was originally made. And, happily, you can still get your hands, or in fact whole body, on one to this day.