Does Tupperware plastic container have microplastics?

Food storage

Elevated exposure

Meaningful plastic contact under conditions known to increase release. Worth swapping if a clean alternative is easy.

Grade B74% confidencePolypropylene or polyethylene tub with a sealing lid

0 · no plastic contact100 · constant contact

Two numbers, not one. Exposure is how much plastic contact this involves. Confidence is how much anyone has actually measured. How we score

The short answer

Yes, and more than a new container would, because these are kept for decades. The measured driver is reheating; the compounding one is age — a tub that has been through a thousand dishwasher cycles has a crazed surface that sheds more than a new one.

Polypropylene tub format profile

Made ofPolypropylene #5

Why Tupperware plastic container scores 62

Microwave reheating, the highest-release condition measured for this container type
Decades of service life — this is the one product category people genuinely inherit
Cumulative dishwasher abrasion, which is visible as clouding and is a real surface change
Cutlery scraping and stain-etching from tomato-based food

Where the 62 comes from

Five components, added. The page renders the parts rather than a stored total, so the number cannot disagree with the reasoning behind it.

Packaging contact: 18 / 30
Use conditions: 21 / 25
Measured release: 18 / 25
Polymer behaviour: 5 / 10
Processing: 0 / 10

Total exposure62 / 100

What we don't know

Nobody has measured an old container against a new one, which is the question every reader with a cupboard full of them actually has. The reasoning that a crazed surface sheds more is sound and is not something we can put a number on.

This section is on every page in the database, including the ones where the answer is comfortable. How evidence grades work →

Better options

Ordered by how much they change, not by how much they cost.

Glass containers

the like-for-like replacement

Retire anything cloudy, stained or scratched

the cheapest single action in this category

Steel tins for lunches

lighter than glass for carrying

Check the one in your kitchen

This page scores Tupperware plastic container as a product. Formulations, packaging and suppliers change, and the specific item you own has its own condition — a scratched pan and a new one are not the same object. Scan yours for a score built from what is actually in front of you.

Scan my food storage

Sources behind this score

Each with the finding we use it for and the limitation that finding carries — because a study quoted without its boundaries is how this subject got so noisy.

peer-reviewed2023
Hussain 2023 (Nebraska) — Three minutes of microwaving released up to 4.22 million microplastic and 2.11 billion nanoplastic particles per square centimetre of container surface.
Limitation: Polypropylene and polyethylene containers with water and acetic acid, not real food. The headline figure is the worst case in the study, per cm², not per meal.
peer-reviewed2020
Du 2020 — Take-out containers released 3–29 microplastic particles each, with polypropylene containers the most common source.
Limitation: Counts particles above the detection limit of the method used, so it says nothing about the nanoplastic fraction, which other work suggests dominates by number.

Frequently Asked Questions

Does Tupperware plastic container have microplastics?

How was the Tupperware plastic container score of 62 calculated?

Five components, added: packaging contact 18/30, use conditions 21/25, measured release 18/25, polymer behaviour 5/10 and processing 0/10. The page computes the total from those parts rather than storing it, so the number cannot drift from the reasoning.

Is Tupperware plastic container safe?

The score does not answer that and we will not pretend it does. It measures plastic contact, which is a physical property of the product. Whether a given level of exposure affects health is an open question — the FDA states the current evidence does not demonstrate a risk at the levels found in food, while research such as the 2024 NEJM plaque study gives real reasons to keep studying it. Both are true at once.

Why is the confidence only 74%?

The product category and packaging format have been measured, but this specific brand or SKU has not. We apply the category result and say so. This is the most common grade, and honestly so. Because this is not a direct measurement of the product itself, the score should be read as a well-reasoned estimate that could move if someone tests it.