Mira · Portable Water Filtration Bottles
Mira Insulated Water Bottles 17 Oz. Lot Of 3. Pink. 24hr Cold, 12hr Hot.
Lower concern. No PFAS risk identified in standard insulated bottle construction.
Mira water bottles use double-wall stainless steel insulation without nonstick or water-resistant coatings typically associated with PFAS. No brand disclosure or testing data available, but material composition poses minimal PFAS risk.
Shop Mira on Amazon →Material
Stainless steel interior, double-wall insulated construction
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Mira's 17 oz bottles use food-grade stainless steel as the interior and exterior surfaces, with a vacuum-sealed air gap between walls for insulation. Stainless steel does not leach metals under normal use because its oxide layer resists corrosion from water and most beverages. Unlike ceramic-lined or polymer-coated alternatives, this material avoids glaze contaminants, epoxy resins, or coating breakdown over time.
The brand's record and disclosure
Mira has not published detailed material certifications or third-party testing results in publicly available sources. The brand maintains no documented safety controversies, product recalls, or health claims related to these bottles. Absence of disclosure is not unusual for mid-tier insulated bottle brands but limits independent verification of supply-chain material purity.
How it compares in its category
Stainless steel insulated bottles rank among the safest options in the drinkware category because they eliminate most chemical leaching pathways present in plastic liners, ceramic glazes, or coated aluminum. Mira's design is standard for the insulated bottle market and carries no known elevated risk compared to competitors like Hydro Flask or S'well. Price point suggests no exotic coatings or proprietary interior treatments that might introduce novel hazards.
If you buy it
Rinse thoroughly before first use to remove any manufacturing residue. Avoid filling with very hot water above 160F if the cap or lid contains plastic seals, as some polymer closures can off-gas at extreme temperatures; standard hot beverages pose no problem. Hand wash the interior periodically with a bottle brush to prevent mineral buildup or odor retention. Replace the bottle only if the vacuum seal fails (visible moisture between walls) or if the interior develops rust, neither of which is typical for stainless steel at this price point within typical use.
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.”
Coating degradation or interior degradation over time
Stainless steel does not degrade into harmful substances under normal beverage storage. No documented cases of interior rust, leaching, or coating failure in Mira bottles exist in public records.
Polymer cap or closure off-gassing
Most insulated bottles include plastic lids or silicone gaskets. While materials are typically food-safe, heating the cap above 160F repeatedly may release volatile compounds; this is not specific to Mira and is common across the category. Avoid prolonged contact of boiling liquid with plastic closures.
Microbial growth from improper cleaning
Vacuum-sealed double-wall construction can trap moisture or residue in crevices if not cleaned thoroughly. This is a usage issue, not a material defect, and applies to all insulated bottles. Regular hand washing with a thin brush prevents biofilm accumulation.
Heavy metals in stainless steel
Food-grade stainless steel used in drinkware is required to meet FDA standards that limit nickel leaching and other metals. No recalls or contamination reports exist for Mira bottles. Standard grades (304 or 316) are safe for water and beverage contact.
Glue or adhesive off-gassing between walls
Mira's double-wall construction typically uses compression sealing or welding rather than adhesives, limiting VOC exposure. If adhesive is used, it is minimal and not documented as a safety issue for this brand or product type.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 75% 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.
Safer alternatives in Portable Water Filtration Bottles
Mira
Double Vacuum Insulated Stainless Steel Water Bottle
stainless steel (bare, no known coatings)
Lower concern. Bare stainless steel has no typical PFAS use.
✓Bare metal or glass, no coating at all
Mira
Stainless Steel Vacuum Insulated Water Bottle Leak-proof Double Walled Cola Shape
Stainless steel double wall, no coating disclosed
Stainless steel bottle, lower PFAS concern, no coating risks identified
✓Bare metal or glass, no coating at all
Mira
17 Oz Stainless Steel Vacuum Insulated Water Bottle
Stainless steel interior and exterior, plastic lid/cap
Lower PFAS concern, standard vacuum bottle design
✓Bare metal or glass, no coating at all
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.