Mira · Portable Water Filtration Bottles
Mira 12 oz Kids Water Bottle Stainless Steel
Lower PFAS concern. Stainless steel bottle, minimal risk.
Stainless steel water bottles are inherently low-PFAS materials. Mira does not disclose coatings or surface treatments, and no public lab data exists for this product.
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Stainless steel, no coating disclosed
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Mira 12 oz Kids Water Bottle is constructed from stainless steel, which is chemically inert and does not leach metals or compounds into water under normal use conditions. Stainless steel (typically 18/8 or similar food-grade alloys) resists corrosion and degradation from acidic beverages, hot liquids, and repeated washing. The absence of any disclosed interior coating, lining, or enamel eliminates risks from ceramic glazes, epoxy linings, or Teflon-type coating (Teflon) fume exposure common in other drinkware.
The brand's record and disclosure
Mira does not publicly disclose detailed material certifications, third-party testing results, or formal PFAS testing statements on this product. No significant safety recalls or adverse event reports appear in public databases for this specific model. The brand markets the bottle as a kids' product but provides minimal transparency regarding manufacturing standards, BPA/BPS testing of any gaskets or seals, or supply-chain verification. This lack of proactive communication is typical of mid-market brands and does not indicate a known hazard.
How it compares in its category
Stainless steel water bottles rank among the safest options for children, avoiding the leaching risks of aluminum (which can leach into acidic or hot liquids) and polycarbonate or acrylic plastics (which may shed microplastics or contain BPA analogs). Compared to coated ceramic or enamel kids' bottles, stainless steel eliminates glaze degradation and lead/cadmium concerns. The trade-off is durability of closures and gaskets, which are typically rubber or silicone and not explicitly tested by the brand.
If you buy it
Inspect the lid, gasket, and any rubber seals for cracks or degradation before first use and periodically during use; replace or contact the manufacturer if seals are damaged. Hand wash the bottle and lid to avoid potential damage to seals from high-heat dishwashers. Avoid prolonged storage of acidic beverages (citrus juices, vinegar-based drinks) at room temperature, as even stainless steel can corrode under extreme conditions. Rinse thoroughly after use to prevent bacterial biofilm growth inside, especially if left wet for extended periods.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Bacterial growth in interior or seals
Stainless steel itself resists microbial colonization, but rubber gaskets and the lid interior can harbor bacteria if not dried thoroughly or maintained regularly. Kids' bottles are at higher risk due to milk, juice, or prolonged wet storage.
Seal/gasket material leachables (rubber or silicone)
No specific test results are published by Mira for lid seals or gaskets. Silicone seals are generally considered safe, but the brand does not confirm material type or BPA/BPS testing. Risk is low if seals are not heated or exposed to solvents.
Aluminum or trace metal leaching
Stainless steel does not leach aluminum. Trace nickel or chromium dissolution is negligible in neutral pH water under normal use and poses no established health risk for short-term consumption.
Coating degradation or flaking
No interior coating is disclosed, so no risk of enamel, epoxy, or paint flaking into water. Exterior powder coat (if present) does not contact beverages.
Microplastic shedding
Stainless steel does not shed microplastics. Plastic components are limited to the lid and seals; risk is minimal if these are not heated or heavily scratched.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
More portable water filtration bottles grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.