I'm not a lover of vintage plastic - but for these I made an exception - I think they are stunning. Quite solid and reasonably heavy for their size. There is just something about plain well made cylindrical shapes too I think, whatever the material.
It is a set of graduated melamine bowls by Erik Kold, Denmark - usually more known for mod flower power designs. (Thanks to Katrina here in Adelaide for the info).
So of their time.