How can I effectively remove pasta stains from Tupperware?

To effectively remove pasta stains from Tupperware, try soaking the container in a mixture of warm water and baking soda, then scrubbing with a sponge or brush. You can also try using a paste of baking soda and water to scrub the stains away. Additionally, leaving the Tupperware in direct sunlight for a few hours can help fade the stains.