I'm constantly throwing away my used tupperware instead of cleaning it
Why would you throw away containers instead of cleaning them?
I'm too lazy to clean them.
It is wasteful to buy containers to just throw them away. It would be better to spend some time washing them so you don't waste so much money.
The money is not a problem.
It's not god for environment to create so much of trash. Why don't you use dishwasher to save the work? If you don't have it, get one.