Klean Kanteen · Portable Water Bottles
Klean Kanteen Rise Classic Insulated Water Bottle
Lower concern. Bare stainless steel construction without known PFAS coatings.
Klean Kanteen Rise uses stainless steel and foam insulation without disclosed water-repellent treatments or nonstick coatings. Standard construction poses lower PFAS risk than treated drinkware.
Shop Klean Kanteen on Amazon →Material
stainless steel body, foam insulation, stainless steel cap
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
The full breakdown
What it's made of and why it matters
The Rise Classic uses food-grade stainless steel (typically 18/8) for the body and cap, which is chemically inert and does not leach metals into water under normal use. The foam insulation layer is sealed between the inner and outer walls, isolating it from contact with drinking water. Stainless steel avoids the aluminum leaching concerns found in some metal bottles and the BPA/BPS risks of plastic liners, making it one of the safer material choices for long-term water storage.
The brand's record and disclosure
Klean Kanteen has built its market position on the premise of safe, non-toxic drinkware and does not use Teflon-type coating coatings or known PFAS treatments on its stainless steel products. The brand maintains no published safety certifications (such as NSF or third-party testing) for this specific model, and makes no explicit public disclosure of material sourcing or manufacturing testing. No significant recalls or safety controversies have been documented for the Rise Classic line in available records.
How it compares in its category
This product sits well above typical plastic water bottles in safety profile, as it eliminates leaching risk from polymers entirely. It is comparable to other bare stainless steel insulated bottles from brands like Hydro Flask or S'well in material safety, though Klean Kanteen's marketing emphasizes the absence of chemical coatings more explicitly. Unlike some budget insulated bottles, there is no evidence of cheap epoxy linings or adhesive-related off-gassing issues in this model.
If you buy it
Hand-wash the bottle and cap rather than dishwasher to minimize potential seal degradation over time; the foam insulation can absorb detergent if the seams are compromised. Avoid prolonged exposure to temperatures above 140°F (60°C) liquid, as excessive heat may weaken the adhesive bonding the insulation layers. Inspect the cap seal annually for cracks or separation; if the insulation jacket delaminates, discard the bottle rather than attempt repair, as internal foam fragments could contaminate water. The stainless steel itself is durable for years of use with basic care.
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.”
Foam insulation off-gassing or leaching
No documented complaints or testing results show that the closed-cell foam used in Klean Kanteen Rise models releases volatile compounds or foam particulates into water. The insulation is sealed from direct water contact by the inner stainless steel wall.
Stainless steel nickel leaching
Food-grade stainless steel (18/8) contains nickel, which can leach in trace amounts if the surface is abraded or if acidic liquids are stored long-term. For most users, levels remain below health concern thresholds, but individuals with severe nickel sensitivity should be aware of this inherent material property.
Cap seal degradation and bacterial growth
The stainless steel cap includes a silicone or rubber seal that can crack, degrade, or harbor biofilm if not cleaned regularly or stored wet. If the seal fails, water may become exposed to contaminants during storage or transit, though the stainless steel bottle itself will not degrade.
Adhesive or glue fumes from insulation assembly
The foam is bonded to the outer wall with industrial adhesive; no off-gassing or volatile compound release has been reported in independent testing or consumer complaints for this product line. New bottles may have a faint odor that typically dissipates within hours of opening.
Coating or lining breakdown over time
Unlike epoxy-lined or coated insulated bottles, the Klean Kanteen Rise uses bare stainless steel with no protective coating, eliminating the risk of peeling or flaking paint and the chemical exposure that follows. The material does not degrade chemically in response to water or moderate temperature cycling.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.
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.