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Hot coffee can pick up plastic particles from some single-use cups and drip bags, according to laboratory studies—but the findings apply to the specific products and conditions tested. The University of Queensland reported in August 2026 that tested takeaway cups with polyethylene (PE) and polylactic acid (PLA) linings released particles into hot liquid. A 2023 study found more than 10,000 particles released from one tested plastic drip bag steeped at 95°C for five minutes. Neither finding identifies sugar or creamer as a source.
Do takeaway coffee cups release microplastics?
Some tested cups did. A University of Queensland report published 27 August 2026 describes tests in which hot liquid contacted single-use cups lined with PE, a fossil-based plastic, or PLA, a plastic often described as biodegradable. Both types released plastic particles in the reported tests. In that study’s comparison, the tested PLA-lined cups released 12 times more particles than the tested PE-lined cups; that ratio is specific to those products and methods, not a rule for every cup made from either material. University of Queensland report.
A cup’s paper exterior does not establish that it is plastic-free. As University of Queensland researcher Dr Elvis Okoffo put it, “A cup made mostly of paper does not mean that the cup is plastic-free because many contain a thin plastic lining that provides water resistance and structural integrity.”
Separate work by the U.S. National Institute of Standards and Technology (NIST) found microscopic particles, including nanoparticles, released from the inner lining of tested single-use beverage cups when heated water contacted it. NIST uses “nanoparticles” for particles smaller than one micrometer. This is evidence of release under the study conditions; it does not quantify an individual’s dose or establish a health outcome. Its result should not be combined with the University of Queensland comparison: the studies had different scopes and methods. NIST’s 2022 account.
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Can coffee drip bags shed plastic particles?
A 2023 study tested drip bags from eight brands, including bags made from PE, polypropylene (PP), polyethylene terephthalate (PET), and rayon. It examined how brewing temperature and time affected particle release. The researchers reported that a single tested plastic bag steeped at 95°C for five minutes released more than 10,000 particles. That figure belongs to the products and protocol in the study; it is not a universal estimate for all drip bags, filters, or cups of coffee. Read the study abstract on PubMed.
If you want to avoid the single-use drip bag format, a reusable pour-over brewer or reusable coffee filter is a practical alternative. The drip-bag study did not test those options against the bags, so it cannot establish their relative particle release or promise zero exposure.
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Are sugar or creamer sources of microplastics in coffee?
The studies described here do not test sugar or creamer as sources of microplastics in brewed coffee. They therefore do not show that either ingredient causes the particle-release findings from cups or drip bags, and they do not establish that sugar or creamer is free of contaminants. Removing them is not a response to the specific release pathways those studies examined.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What changes avoid particular single-use formats?
- For takeaway coffee: Bring a reusable takeaway cup, such as a stainless-steel cup, to avoid the disposable cup itself. The cup’s complete construction—including its lid and any coatings—still matters; “stainless steel” alone does not prove that every part is plastic-free.
- For drip-bag coffee: Use a reusable pour-over brewer or filter to avoid the single-use bag. This is a format choice, not a tested guarantee about particles or health.
- When buying a cup: Look for specific information about the inner lining and other components rather than relying on labels such as “paper” or “compostable.” The University of Queensland tests show why the lining matters in the products studied.
A Government of Western Australia life-cycle assessment summary compares disposable 240 ml hot-beverage cups—including PE-lined paperboard with a polystyrene lid and PLA-lined certified-compostable paperboard with a bagasse lid—with reusable hard-plastic and stainless-steel options. Its scenario models 100 uses. That assessment concerns life-cycle impacts, not particles entering coffee or medical safety, so it cannot establish that a reusable cup reduces microplastic exposure. Government of Western Australia summary.
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