I can’t think of a more useful collectible than Tupperware. It is stylish with classic designs and colors appropriate to the era. And it is very functional. It is rare to find any with structural or functional damage. All that is needed is a cursory scrubbing before use.
The very old pieces from the 1950s and 60s are classic retro colors, soft yellow, pink, turquoise, etc. The pieces from the 70s likewise represent that era’s aesthetic mod sensibilities: bright oranges and yellows, along with colors such as the classic harvest gold,chocolate browns, and muted army greens.