Mira Stainless Steel Vacuum Insulated Water Bottle Leak-proof Double Walled Cola Shape
Stainless steel bottle; lower PFAS concern, no coating risks found.
This vacuum-insulated bottle is uncoated stainless steel with double walls. No surface treatments linked to PFAS are standard for this design.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel double wall, no coating disclosed
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Mira Stainless Steel Vacuum Insulated is made of, ingredients and materials
This bottle uses 18/8 stainless steel (304-grade or similar) for both inner and outer walls, separated by an air gap for insulation. Stainless steel is a passive material, its chromium oxide layer resists corrosion and leaching across pH ranges typical of drinking water, juice, and mild acidic beverages. No enamel, ceramic coating, or polymer liner is disclosed, which eliminates the risk of glazing or non-stick coating degradation. The lid assembly (material unspecified in marketing) is the only unknown component.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Lid gasket material and bacterial growth
Mira does not disclose lid gasket material (likely silicone or rubber). If not fully dried or replaced when degraded, gaskets can harbor bacteria or mold, especially in humid climates. This is a maintenance issue, not a manufacturing defect.
Unknown lid/cap component composition
The lid assembly material is not specified in available product documentation. If plastic, it could contain BPA or other polymers; if metal, leaching risk from those polymers is not a material concern on record. Request clarification from Mira before purchase if concerned.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Stainless steel corrosion under extreme pH
18/8 stainless steel is highly resistant to tap water and most beverages. No recalls or reports of leaching exist for Mira bottles. Corrosion risk is only elevated if you store highly acidic liquids (vinegar, lemon juice concentrate) for extended periods.
Coating or adhesive off-gassing from manufacturing
No enamel, ceramic, or polymer coating is disclosed, reducing off-gassing risk compared to coated alternatives. Stainless steel does not off-gas. Any residual manufacturing oils or adhesives should dissipate with normal washing.
Heavy metals
18/8 stainless steel does not leach lead, cadmium, or antimony under normal drinking water conditions. No independent testing data is publicly available for Mira bottles, but the material class carries negligible risk if composition meets basic stainless steel standards.
Source, FDA ↗The full breakdown
The brand's record and disclosure
Mira is a mid-tier hydration brand with minimal public safety certifications or third-party testing disclosures available. The company does not publish material sourcing, manufacturing standards, or lid component specifications on standard retail sites. No recalls, litigation, or contamination incidents are on record for Mira water bottles. The silent stance on PFAS and material certifications reflects common industry practice for non-premium brands but limits independent verification.
How it compares in its category
Stainless steel vacuum bottles have lower leaching risk than plastic bottles, as they are not a material linked to BPA, BPS, and phthalate concerns. Mira's uncoated design avoids the Teflon-type coating or enamel risks seen in some budget cookware-grade insulated bottles. Premium competitors (Hydro Flask, S'well) typically publish lid materials and sometimes FDA or NSF certifications; Mira does not. For the price point, the material choice is solid; transparency is the gap.
If you buy it
Wash the bottle and lid by hand with warm soapy water before first use to remove any manufacturing residue. Avoid prolonged contact with highly acidic liquids (pH below 3.5) if stored for days, as even stainless steel can corrode under extreme conditions. Replace the silicone or rubber gaskets if they become cracked, discolored, or develop odor. Store empty and dry between uses to prevent any microbial growth in the seal areas.
What we don’t know
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Mira has made none
Formulations change between production runs, so check the current label. How we grade.
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More portable water 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.