The Monobloc Chair – aka the stackable plastic patio chair that you may currently own – has been described (by Wikipedia and Treehugger at least) as the world’s most common plastic chair. My house came with a few of these stacked gems, and I kept them for a long while because they were convenient and stackable. I thought they would never wear out, but they did.
The Monobloc – a chair made of one piece of plastic – was introduced by Canadian designer D.C. Simpson in 1946.