To remove tomato or curry stains from Tupperware, scrub with a paste of bicarbonate of soda, then leave the container in direct sunlight for a few hours to bleach out the colour. For stubborn curry stains, soak it in white vinegar first, then do the bicarb and sunlight steps. Smells lift with bicarb or a vinegar solution and a spell in fresh air. Best of all, a few habits stop the staining happening in the first place.
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Why does Tupperware stain and smell?
Plastic is slightly porous, and the pigments in tomato and curry are oil-soluble, so they soak into the surface rather than sitting on top like a water-based stain. That is why a normal wash leaves an orange or yellow tinge behind. Heat makes it worse: pouring hot bolognese into a container, or microwaving a curry in it, drives the colour and the smell deep into the plastic.
How to remove stains from Tupperware
The reliable combination is a bicarbonate of soda scrub followed by sunlight. The bicarb is a gentle abrasive that lifts the surface stain, and ultraviolet light then bleaches out what is left, for free.
- Make a paste of 2 to 3 tablespoons of bicarbonate of soda with a little water. For greasy curry stains, add a squirt of washing-up liquid.
- Spread it over the stained areas, leave for 15 to 20 minutes, then scrub with a soft sponge and rinse.
- Wash and dry the container, then leave it in direct sunlight, on a sunny windowsill or outside, for 3 to 5 hours. The UV bleaches the remaining stain and kills odours.
For stubborn curry stains
Turmeric in curry is the hardest stain of all. Tackle it in this order: fill the container with undiluted white vinegar and soak for 30 to 60 minutes (the acid breaks the pigment’s bond with the plastic), rinse, then do the bicarb paste, rinse again, and finish in the sun. For heavily stained containers, an oxygen bleach soak (warm water plus a scoop, an hour or two) is very effective before the sunlight step.
How to get smells out of Tupperware
Smells respond to different treatment from stains, though sunlight helps both.
- Bicarbonate of soda: sprinkle some in the dry container, or leave a bicarb paste smeared inside overnight, then wash.
- Vinegar solution: a soak of 1 part white vinegar to 3 parts water neutralises lingering odours, then rinse well.
- Fresh air and sun: leave the clean, dry container open in sunlight or a breezy spot for a few hours.
- Scrunched newspaper: pack the dry container with newspaper, seal it overnight, and the paper absorbs the smell.
Stain and smell fixes at a glance
| Problem | Fix | Why it works |
|---|---|---|
| Tomato or orange stain | Bicarb paste, then 3 to 5 hours in sunlight | UV bleaches the oil-based pigment |
| Curry or turmeric stain | Vinegar soak, then bicarb, then sunlight | Acid breaks the curcumin bond first |
| Greasy film | Bicarb paste with a squirt of washing-up liquid | Cuts the grease holding the stain |
| Lingering smell | Bicarb or a 1:3 vinegar solution, then air | Neutralises and absorbs odour molecules |
| Heavy, set-in staining | Oxygen bleach soak, then sunlight | Oxidises stubborn colour safely |
How to stop Tupperware staining in the first place
- Let food cool before you store it. Hot food drives stains and smells into the plastic.
- Give the container a light spray or wipe of cooking oil before adding tomato-based food; the stain sits on the oil, not the plastic.
- Do not microwave oily or tomato-based food in plastic. If you must reheat in it, take the lid off, or better, decant to a plate or glass.
- Wash containers promptly, before the stain and smell have time to set.
- For food you reheat often, consider glass storage containers, which do not stain or hold smells.
Keeping the whole kitchen on top of grease and smells helps too, see our kitchen deep clean guide. The same porous-plastic issue is why plastic chopping boards stain, and why a reusable water bottle needs regular care.
Cupboard staples fix most stains; oxygen bleach and glass containers handle the rest.
Myths vs facts
| Claim | The reality |
|---|---|
| Stained Tupperware is dirty or unsafe | A washed but stained container is clean; the colour is pigment soaked into the plastic, not grime. |
| Only bleach removes tomato stains | No. A bicarb scrub plus a few hours of sunlight removes most stains for free. |
| Washing hotter gets stains out | Heat can actually set stains deeper. Bicarb and UV work better than hot water alone. |
| Nothing stops it staining | Cooling food first, an oil wipe, and not microwaving in plastic prevent most staining. |
Frequently asked questions
How do you get tomato stains out of Tupperware?
Scrub with a paste of bicarbonate of soda and a little water, leave 15 to 20 minutes, rinse, then place the clean container in direct sunlight for 3 to 5 hours. The bicarb lifts the surface stain and the UV light bleaches out the rest.
How do you remove curry stains from plastic containers?
Curry is the toughest because of the turmeric. Soak the container in undiluted white vinegar for 30 to 60 minutes, rinse, scrub with a bicarb paste, rinse again, then leave it in sunlight for a few hours. An oxygen bleach soak before the sunlight helps on heavy stains.
Does sunlight really remove Tupperware stains?
Yes. Ultraviolet light bleaches the oil-based pigments from tomato and curry, and it helps clear odours too. Leave the clean, dry container on a sunny windowsill or outside for 3 to 5 hours after scrubbing.
How do you get smells out of Tupperware?
Sprinkle bicarbonate of soda inside, or soak with a solution of 1 part white vinegar to 3 parts water, then rinse. Leaving the clean container open in fresh air and sunlight, or packing it with scrunched newspaper overnight, also absorbs stubborn smells.
Why does my Tupperware stain so easily?
Plastic is slightly porous and the pigments in tomato and curry are oil-soluble, so they soak in rather than washing off. Heat makes it worse, which is why microwaving or storing hot food stains containers the most.
Can you use bleach on Tupperware?
You can use a diluted bleach or, better, an oxygen bleach soak for very stubborn stains, then wash the container thoroughly and let it air before using it for food. For everyday stains, bicarb and sunlight avoid bleach altogether.
How do I stop Tupperware staining?
Cool food before storing it, wipe or spray the container with a little cooking oil before adding tomato-based food, and never microwave oily or tomato food in plastic. Washing promptly and using glass for reheated foods also helps.
Is stained Tupperware safe to use?
A stain on its own does not make a clean container unsafe; it is just pigment in the plastic. However, if a container is heavily scratched, warped or cracked, it is worth replacing, and glass containers avoid staining and smells entirely.
