How Do You Keep Tomatoes from Staining Tupperware?

Plastic wrap: To keep your tomato dish away from any additional grease or fat, you can always line your container with plastic wrap. The plastic liner will act as a shield, protecting your plastic container from any stubborn, set-in stains.

How do you keep tomato stains from Tupperware?

Forte recommends spraying a light coating of cooking oil on the inside of your container to create a layer between the food and the plastic. This will help keep your container stain-free, even when you store the most transferrable of foods (*cough* tomato sauce *cough*).

Why does tomato sauce stain my Tupperware?

The culprit for those stains is a bright red pigment in tomatoes called lycopene. This molecule is 'hydrophobic' (it repels water), and so are your plastic containers. Hydrophobic molecules come together in order to minimise their contact with water, so the pigment clings to the containers.