MiiR Review, Is MiiR Non-Toxic?
MiiR averages 78 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 MiiR products graded as of October 2026, and all 4 reach its 70 point pass mark.
MiiR grades Excellent on our four-band scale. On disclosure, the brand says nothing publicly about PFAS. See what every brand has published about PFAS for how that compares.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
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- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
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- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
Does MiiR have PFAS, by category
Which MiiR products are PFAS-free? Good or better, best-graded first
- Stainless steel body, vacuum insulation
- We found no PFAS statement from the brand
- Seal and gasket material degradation. Lid gaskets are typically silicone or rubber; prolonged exposure to hot…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel interior, vacuum insulation, unspecified lid/exterior coating
- We found no PFAS statement from the brand
- Lid coating or sealant composition (unspecified). The exterior coating and lid material are not specified in…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel tumbler with silicone grip
- We found no PFAS statement from the brand
- Stainless steel nickel leaching. Nickel content in 18/8 stainless steel can leach in trace amounts if the…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel with powder-coated finish
- We found no PFAS statement from the brand
- Powder-coat durability and adhesion, REI Co-op product pages do not specify powder-coat adhesion standards or…
3 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonWhat to buy instead Good or better, in the categories MiiR sells
- Stainless steel bottle, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Powder-coat cap degradation over time
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle, plastic cap and silicone gasket
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation and leaching
3 hazards checked on this product, all on its full breakdown.
MiiR and PFAS, common questions
- Does MiiR have PFAS?
- MiiR averages 78 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 MiiR products graded as of October 2026, and all 4 reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is MiiR non-toxic?
- Climate+ Tumbler 12 oz is the highest-graded MiiR product we have scored, at 85/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which MiiR products are lower concern for PFAS?
- The highest-graded MiiR products we have scored are Climate+ Tumbler 12 oz, Vacuum Insulated Wine Tumbler 10 oz, MiiR 360 Traveler. That is our model-based estimate from materials and public disclosure, not a lab test.
Every grade uses the same public rubric. How grades work →