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Does Plastic ice cube tray have microplastics?

31/ 100

Cookware & prep

Moderate exposure

Some plastic contact, but limited by material, temperature or contact time. Reasonable as a default.

Grade D47% confidencePolypropylene or polystyrene tray
31
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

Low, and not zero for an unusual reason: cold is the strongest mitigating condition there is, but twisting a rigid tray to crack the ice out is deliberate mechanical stress on a cold, brittle polymer.

Why Plastic ice cube tray scores 31

Where the 31 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
14 / 30

What material touches the contents, over how much surface area, for how long. Glass and steel score near zero here; a film pressed against fatty food scores near the top.

Use conditions
8 / 25

Heat, abrasion, flexing, repeated opening, reuse beyond design life. The same bottle scores differently in a fridge and in a hot car.

Measured release
4 / 25

What a laboratory actually counted, for this product or its category. A high number here means real particles were measured, not that the material looks suspicious.

Polymer behaviour
5 / 10

How this specific polymer behaves — brittleness, fat solubility of its additives, thermal stability, whether it is a polymer named in existing restrictions.

Processing
0 / 10

What happened before you bought it. Retort sterilisation inside the pack, hot-filling, and pressurised brewing all happen at the most migration-favourable moment.

Total exposure31 / 100

What we don't know

Unmeasured. Cold-temperature particle release has barely been examined in any product, because every published protocol is interested in heat. The brittleness argument is sound materials science and is not a result.

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.

Stainless steel ice tray

a lever release, no flexing, lasts forever

Silicone tray

flexes without fatiguing, though less studied

Replace any tray that has gone white along the flex lines

that whitening is the polymer failing

Check the one in your kitchen

This page scores Plastic ice cube tray 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 cookware & prep

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.

  1. peer-reviewed2022

    Zangmeister 2022 (NIST) — Nylon bags, LDPE food-storage bags and similar single-use plastics shed trillions of sub-100 nm particles per litre in ordinary contact with water.

    Limitation: Deionised water at controlled temperature. Nanoparticle counts are inherently large numbers; the study is about their existence and quantity, not their fate in the body.

  2. peer-reviewed2019

    Winkler 2019 — Refilling and mechanically stressing PET bottles measurably increased particle release compared with first use.

    Limitation: A laboratory stress protocol rather than observed household reuse. It establishes direction — reuse of single-use PET makes things worse — more firmly than magnitude.

  3. 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.

Frequently Asked Questions

Does Plastic ice cube tray have microplastics?

Low, and not zero for an unusual reason: cold is the strongest mitigating condition there is, but twisting a rigid tray to crack the ice out is deliberate mechanical stress on a cold, brittle polymer.

How was the Plastic ice cube tray score of 31 calculated?

Five components, added: packaging contact 14/30, use conditions 8/25, measured release 4/25, 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 Plastic ice cube tray 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 47%?

The score is inferred from the packaging and how the product is used, with no measurement at any level. Directionally useful for choosing between two options; not a number to quote as fact. 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.

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Pyrex glass storage container

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Plastic sippy cup

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Grade C · 60%

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