from
The Collaborative International Dictionary of English v.0.48
Tupperware \Tupperware\, Tupper ware \Tup"per ware\, n. [Trade
name.]
1. the collective trade name for a type of plastic
food-storage container with a translucent bottom and a
close-fitting lid designed to seal the container tightly.
It is in common use in the late 20th century and early
21st century in the U. S. It comes in a variety of shapes
and sizes, suitable for storing a variety of items. Also
used attributively. She saved the leftovers in a couple of
Tupperware containers.
[PJC]