Mira · Insulated Travel Drinkware
32 oz Sierra Spout Lid Handle Lid
Standard water bottle lid; no confirmed PFAS risk signals.
MIRA spout lid is a basic plastic and metal component with no disclosed PFAS treatments. No public testing or certifications available; typical consumer water bottle lid carries lower concern but lacks transparency.
Shop Mira on Amazon →Material
Plastic lid and spout components, stainless steel handle
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).
Category baseline
other is a category where PFAS exposure is more common.
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 Sierra lid combines a plastic spout and lid assembly (material type not publicly specified by brand, likely polypropylene or polyethylene) with a stainless steel handle loop. Plastic lids used in water bottle systems typically don't involve high-temperature coating processes that create lead or cadmium risk, and the stainless steel handle avoids aluminum leaching concerns. The absence of ceramic, enamel, or non-stick coatings means Teflon-type coating fume and coating degradation hazards do not apply to this component.
The brand's record and disclosure
MIRA does not publicly disclose detailed material specifications or third-party certifications for the Sierra lid on record. The brand has not faced documented safety recalls related to this product line as of available public records. MIRA maintains a generally low-profile safety stance with minimal transparency statements; no confirmed controversies regarding chemical migration or leaching have emerged.
How it compares in its category
Water bottle lids and spout assemblies are typically lower-risk plastic components compared to cookware or food-storage containers because they hold liquid at ambient temperature and do not involve repeated heating. The MIRA Sierra lid is functionally standard within its category; the stainless steel handle differentiates it positively from purely plastic alternatives that may degrade faster. No independent test data places this lid above or below peers in contamination risk.
If you buy it
Hand wash the lid and spout assembly in cool to warm water; avoid dishwasher cycles above 140°F if possible to minimize plastic stress. Replace the lid if the plastic shows cracks, cloudiness, or warping, as these indicate potential microplastic generation over time. Store away from direct sunlight and heat sources. The stainless steel handle requires no special care and should remain durable for the product lifespan.
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.”
BPA and related endocrine disruptors (BPA/BPS)
MIRA has not disclosed the specific plastic resin used in the Sierra lid; modern water bottle lids are frequently BPA-free polypropylene, but no public certification or test report confirms this for this specific product.
Microplastic generation and migration
Repeated thermal stress, mechanical wear, and UV exposure can cause small plastic particles to shed from the spout and lid edges into water over months to years of use; this is a general risk for any plastic lid, not unique to MIRA, and increases with age.
Stainless steel leaching or contamination
Food-grade stainless steel (typically 304 or 316) used in bottle handles does not leach nickel or chromium at significant levels into water; no reports of contamination from MIRA stainless components on record.
Mold and bacterial growth in crevices
The spout assembly and handle junction may trap moisture and food residue if not cleaned thoroughly after use; this is a maintenance issue, not a manufacturing defect, and is controllable through regular disassembly and drying.
Phthalate plasticizers
Rigid plastic lids typically do not require phthalate plasticizers; no evidence of phthalate use in water bottle lid components, though brand does not publicly confirm this.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 65% 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.
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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.