This set of nesting tables by Kartell is made from ABS plastic and designed by Giotto Stoppino. It's from the 1970s and a real space age item. The set contains out of three side tables that neatly fit on top of each other. All three have discolored a bit over the years into this off white/cream color, as you can see in the pictures. 

They are all still in good condition with some marks of usage. The price is for the complete set.

Dimensions
Height: 41 cm
Ø: 50 cm