Does Pyramid mesh tea bag have microplastics?

Tea

High exposure

Heat, abrasion or direct contact with fatty food, usually more than one at once. The highest-value swaps live here.

Grade A90% confidenceNylon or PET mesh

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 by the largest measured margin of any single item in the food literature. One nylon or PET pyramid bag at 95°C released about 11.6 billion microplastic and 3.1 billion nanoplastic particles into a single cup.

Plastic mesh tea bag format profile

Made ofNylon

Why Pyramid mesh tea bag scores 87

A polymer mesh steeped directly in near-boiling water — the polymer is not packaging here, it is in the cup
Extremely high surface area relative to the volume of water, by design
Dunking, stirring and squeezing the bag against the mug add mechanical stress at peak temperature
Long steeps, which are common and which extend everything above

Where the 87 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: 30 / 30
Use conditions: 24 / 25
Measured release: 25 / 25
Polymer behaviour: 8 / 10
Processing: 0 / 10

Total exposure87 / 100

What we don't know

The 11.6 billion figure is a particle count, not a mass — the total plastic involved is small in weight. The study measured release into water and did not follow what happens after ingestion. Health consequences at this dose are not established by this or any other study, which is a separate question from whether the particles are there.

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.

Loose leaf with a steel infuser

the direct swap, and it is cheaper per cup

Stapled or stringed paper bags

not perfect, and a large step down

Check the one in your kitchen

This page scores Pyramid mesh tea bag 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 tea

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-reviewed2019
Hernandez 2019 (McGill) — A single nylon or PET pyramid tea bag steeped at 95°C released about 11.6 billion microplastic and 3.1 billion nanoplastic particles into one cup.
Limitation: Four commercial bags, brewed empty of tea leaves to avoid interference. The particle count is enormous but the total mass is small, and the study measured release into water, not what happens after you drink it.
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.
report2026
Earth Action 2026 — Estimated roughly 1,000 tonnes of microplastics migrate from packaging into food and drink annually — about 130 mg per person per year — with PET bottles responsible for around a third, and found UV exposure can raise release up to 100×.
Limitation: An industry-funded modelling exercise, not a laboratory study, and not peer-reviewed. We use it for the relative ranking of formats rather than for any absolute number.

Frequently Asked Questions

Does Pyramid mesh tea bag have microplastics?

How was the Pyramid mesh tea bag score of 87 calculated?

Five components, added: packaging contact 30/30, use conditions 24/25, measured release 25/25, polymer behaviour 8/10 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 Pyramid mesh tea bag 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 90%?

This exact product, or an item identical to it, has been measured for particle release in a peer-reviewed study. The number is anchored to a laboratory result rather than to a material.