You know the tub. The one that used to be clear and is now the colour of a traffic cone because it once held leftover bolognese. Tomato stains on plastic containers are one of the most stubborn little stains in the whole kitchen — but the fix takes thirty seconds, one paper towel, and a squirt of washing-up liquid. No bleach, no elbow grease, no buying new tubs.
Why Tomato Stains Plastic So Badly
Tomatoes are naturally oily, and plastic is slightly porous. When hot tomato sauce sits in a container, the orange-red pigment (lycopene) bonds with the oily residue on the plastic’s surface and settles into those microscopic pores. That’s why cold washing never quite shifts it — the stain isn’t sitting on top, it’s locked in. The paper-towel shake works because it combines a mild abrasive (the paper towel fibres) with a degreaser (the washing-up liquid) and mechanical agitation, all at once.
What You’ll Need
- The stained plastic container and its lid
- One or two paper towels (or a sheet of kitchen roll)
- Washing-up liquid
- Warm water
The 30-Second Paper Towel Shake Method
- Rinse the tub. Give the container a quick rinse under warm water to remove any leftover food. Warm is fine — it doesn’t need to be boiling.
- Add washing-up liquid. Squirt a generous dollop of washing-up liquid (about a tablespoon) straight into the container. Don’t skimp here; you want enough to create a good lather.
- Add warm water. Pour in about 100–150 ml of warm water — enough to swish around but not so much that the container is full. Roughly a third full works well.
- Tear in paper towels. Rip one large sheet of kitchen roll into two or three rough pieces and drop them in. They should be big enough to rub against the walls of the tub as it moves.
- Seal and shake. Put the lid on tightly (this is important — check it’s clipped or screwed down properly) and shake hard for 30 seconds. Shake it like you’re making a cocktail: up, down, side to side.
- Rinse and check. Pour everything out and rinse the tub under warm water. For most tomato stains, it’s gone completely after one round.
For Really Stubborn Stains: The Baking Soda Paste
If the stain has been building up for months and one shake doesn’t fully clear it, try this second-level treatment. Make a paste of two tablespoons of baking soda and a teaspoon of water, spread it over the stained area, and leave it for 15 minutes. The mild alkalinity of baking soda breaks down the oily bond the tomato pigment has formed with the plastic. Scrub lightly with a soft sponge, then rinse. Between the shake and the paste, I’ve never met a tomato stain that survived.
Sunlight is another free option: after washing, leave the damp tub in direct sunlight for a couple of hours. UV light naturally bleaches out the remaining orange tint.
How to Stop It Happening Again
- Cool food before storing it. Heat is what drives the stain into the plastic. Let sauces cool to room temperature first.
- Line it with cooking spray. A very light spray of oil on the inside of the tub before adding tomato-based food creates a barrier.
- Use glass for the worst offenders. If you regularly store bolognese, curry, or turmeric-heavy dishes, keep one or two glass containers for those and save the plastic for everything else.
- Wash promptly. Stains set with time. Even a quick rinse straight after emptying the tub makes a big difference.
FAQ
Does the paper-towel shake work on turmeric stains too? It helps, but turmeric is a much stronger dye than tomato. The shake will lighten it significantly; for full removal, follow up with the baking soda paste and a couple of hours in direct sunlight.
Is it safe to shake a plastic container that hard? Yes, as long as the lid is properly secured. Check the seal before you start — and maybe shake it over the sink the first time, just in case.
Will this scratch the plastic? Paper towels are soft enough that they won’t scratch plastic containers. Don’t swap in a scouring pad or steel wool for this trick — those will scratch and make future staining worse.
Can I use this on stained plastic lids? Absolutely. Lids usually stain less than bases because they don’t sit in the sauce, but the same shake works — just make sure the lid seals well enough to hold water.
If you enjoy this kind of natural cleaning, you’ll love our microwave steam-clean method using lemon — same principle, zero chemicals, spotless results: how to clean a microwave with lemon.