There are many commercial products used on a daily basis that are made from plastic polymer.
Injection moulded plastic seating can be made from a variety of different polymers. A popular chair, called the ‘polyside’ chair, was designed by Robin Day and launched in 1963. It was the first to be injection moulded from a single piece of polypropylene and is a design icon, having been copied in many forms since. It is still in production in some form today.
When making chairs, a polymer is a good choice of material:
they can be injection moulded in mass
the colours can be changed
the identically duplicated shape means the chairs can often be stacked