Klean Kanteen · Portable Water Bottles
Klean Kanteen 64 oz Wide Water Bottle with Loop Cap
Brand PFAS statement on record, which we have not verified.
Klean Kanteen describes its bottles as BPA, PFAS and lead-free. We record that as an unverified brand claim.
Brand says: “Klean Kanteen describes its bottles as BPA, PFAS and lead-free.”
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel body, plastic cap
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
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What Klean Kanteen 64 oz Wide Water Loop Cap is made of, ingredients and materials
The Klean Kanteen 64 oz Wide uses a stainless steel (typically 18/8 food-grade) body, which is chemically inert and does not leach metals into beverages under normal use. The loop cap is plastic, most likely polypropylene (PP) or similar food-contact polymer. Stainless steel is resistant to corrosion and does not require protective coatings that could degrade or flake; the plastic cap is a minor contact surface for liquids and poses negligible leaching risk at room temperature. This material pairing has lower concern for PFAS compared to products with Teflon-type coating-based non-stick or water-repellent coating coatings.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Microplastics
The polypropylene or polyethylene-based cap may degrade very slowly with UV exposure or repeated thermal cycling over years of use. Degradation risk is low for room-temperature water storage, but high heat or freezing could accelerate it. No reports of microplastic shedding from Klean Kanteen caps have been published.
Source, EPA ↗Cap seal durability and bacterial growth
The loop cap's seal quality determines whether the bottle remains airtight during storage. If the seal degrades or if the cap is left off, water exposed to air for extended periods can support bacterial or mold growth, particularly if the bottle is left warm or in sunlight. Proper cleaning and prompt use minimize this risk.
What’s reassuring
Brand-stated PFAS-free
The brand states this product is PFAS-free. We have not verified the claim.
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Metal leaching from stainless steel
Food-grade stainless steel (18/8) is stable in contact with water and does not leach nickel, chromium, or other metals at neutral pH and room temperature. Acidic beverages (citrus, vinegar) can theoretically increase leaching over extended storage, but this is not a practical concern for drinking water or typical use.
Coating or surface treatment hazards
The stainless steel body has no additional coating, enamel, or non-stick treatment. The cap material is not described as treated with water-repellent or antimicrobial coatings in available product information, so no coating-related risks are identified.
Formaldehyde / VOCs
Modern polypropylene caps are not treated with formaldehyde-releasing resins or antimicrobial finishes in standard food-contact applications. No formaldehyde or VOC off-gassing has been reported for Klean Kanteen caps.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
Klean Kanteen has built its brand identity on PFAS-free manufacturing and has publicly committed to avoiding added PFAS in coatings and manufacturing processes. The brand has been transparent about avoiding non-stick and water-repellent treatments that historically contained PFAS. No major recalls or safety controversies related to this product line are on record. The company's supply chain and third-party certifications are not fully public, so the claim is not independently verified by a regulatory body, but the stated stance aligns with disclosed practices.
How it compares in its category
Stainless steel water bottles like this one are considered the gold standard in the reusable bottle category, avoiding the BPA and phthalate concerns of polycarbonate or older plastics. The wide-mouth design and durable construction reduce the need for frequent replacement compared to plastic bottles. Klean Kanteen states its products are PFAS-free, which distinguishes them from competitors using Teflon-type coating-based non-stick or water-repellent coating coatings on lids or seams. The loop cap is simpler than insulated double-wall designs, which may have sealed plastic interfaces but no added complexity for safety.
If you buy it
Wash the bottle and cap by hand or in a dishwasher; stainless steel is durable but high-heat dishwashers may cause cosmetic discoloration of the cap over time. Do not fill with boiling liquids repeatedly if the cap seal is tight, as this can create pressure. Inspect the plastic cap periodically for cracks or degradation; if the cap weakens or breaks, replace it with an OEM cap rather than an incompatible one. The stainless steel body will last indefinitely with normal use; retire the bottle only if the seal fails or structural damage occurs.
What is not known about PFAS in this product?
- Basis
- Model estimate, 75% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Klean Kanteen has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Klean Kanteen 64 oz Wide Water Bottle with Loop Cap?
- 18/8 stainless steel, no interior coating
- The brand calls it PFAS-free, which we have not verified
- Cap or closure contamination
2 hazards checked on this product, all on its full breakdown.
- stainless steel body, foam insulation, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Cap gasket and seal contamination
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.