Klean Kanteen · Portable Water Bottles
Klean Kanteen 64 oz Wide Water Bottle with Loop Cap
Lower risk; stainless steel core is inherently PFAS-free, cap material unspecified.
Klean Kanteen makes stainless steel bottles with minimal coatings. The bottle body carries lower PFAS risk, though the cap material and seal aren't publicly disclosed.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel body, plastic cap
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
BPA & bisphenols
Cap material is not specified; if polycarbonate or recycled plastic, BPA or BPS could migrate into water, especially if heated or aged. Klean Kanteen does not certify the cap as BPA-free in public documentation.
Source: FDA ↗Cap degradation over time
Plastic caps can crack, cloud, or leach polymer fragments after repeated washing and use. No published durability data for this specific cap design is available.
What’s reassuring
Safe base material
Made from ceramic, mineral, or natural fiber with no PFAS risk.
Stainless steel corrosion or nickel leaching
Food-grade 18/8 stainless steel is corrosion-resistant under normal water storage. Nickel leaching is not a documented concern for quality stainless steel bottles used in this way.
Bacterial growth in bottle interior
Stainless steel does not harbor bacteria; risk only arises if cap seals are compromised or bottle is left wet and sealed for weeks without cleaning.
VOC or off-gassing from cap
No documented off-gassing complaints or test data for Klean Kanteen caps. Risk is low compared to vinyl or rubber gaskets, but not formally ruled out.
The full breakdown
What it's made of and why it matters
The 64 oz body is food-grade stainless steel (typically 18/8), which is chemically inert and does not leach metals into water under normal use. The Loop Cap is plastic (material type not specified by Klean Kanteen); this is the only component where polymer-related hazards could theoretically occur. Stainless steel bottles avoid aluminum leaching and ceramic/enamel coating degradation that affect other water bottle types.
The brand's record and disclosure
Klean Kanteen does not publicly disclose cap polymer composition or provide third-party safety testing results. The brand markets itself as an eco-conscious alternative to plastic bottles and has no documented recalls or safety controversies in consumer safety databases. No certifications (BPA-free claims, NSF, FDA approval statements) are routinely published for this model.
How it compares in its category
This is not a water filter product; it is a reusable storage bottle. As a passive stainless steel container, it carries lower contamination risk than filtered systems that require maintenance and housing materials. Compared to plastic-bodied reusable bottles, the stainless steel design eliminates BPA and phthalate leaching from the main vessel.
If you buy it
Hand wash the cap separately and inspect it regularly for cracks or cloudiness (signs of degradation). Do not expose to extreme heat (dishwasher safe, but avoid prolonged boiling). Replace the cap if it shows wear; Klean Kanteen sells replacement caps. Store water at room temperature; the stainless steel does not degrade over time with normal water storage.
What we don’t know
- Basis
- Model estimate, 75% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Klean Kanteen has made none
Formulations change between production runs, so check the current label. How we grade.
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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.