How do i get tomato sauce stains out of plastic containers?

To remove tomato sauce stains from plastic containers, start by rinsing the container with cold water to prevent the stain from setting. Then, apply a mixture of baking soda and water to form a paste, and scrub the stained area with a sponge or cloth. Alternatively, you can soak the container in a solution of warm water and dish soap for about 30 minutes before scrubbing. If the stain persists, using white vinegar or lemon juice can help lift the discoloration.