Tupperware is a manufacturer of sealable plastic containers, available in a number of sizes and shapes, that are typically used for storing leftover foods, sauces or cooking oils. Though the containers are durable and resistant to staining, they can can become discolored or develop a greasy film over time. Avoid spending money on replacement Tupperware by cleaning your current batch with household products.
Place a stopper in your sink's drain and fill it with warm to hot water.
Submerge the greasy Tupperware container in the water and allow it to soak for several minutes.
Squirt several drops of dishwashing liquid onto the soft side of a sponge. Squeeze the sponge to create a rich, soapy lather.
Wash the inside of the container with the soft side of the sponge. Rinse the Tupperware container out with warm water; follow with a cool-water rinse.
Pat the container dry with a paper towel and check that all of the grease is gone. If not, repeat Steps 2 through 5.
Place the Tupperware in direct sunlight for a few hours to dissolve stains caused by tomato and other sauces. Or, you can soak the container in a mixture of one part water and one part bleach.