Tupperware products was kinda of perfect, perhaps too perfect. The only improvement I could see was the colour or texture.
The products were durable, we had Tupperware in our home that lasted almost 6-7 years. Imagine getting a sale from a household once in 7years. 😂

Jokes aside. I also believe that Tupperware are company could have ventured more into different durable products. They limited themselves to kitchen and ended up in the sink.

Imagine if Tupperware designed medical equipments like the elbow slings, crutches, prosthetics. When I told mom about the bankruptcy of Tupperware the reaction was areyre aacha dabba tha. Basically Tupperware means dabba. Like you said it's on R&D.