Klean Kanteen · Insulated Travel Drinkware
Klean Kanteen 16oz Rise Tumbler
Lower PFAS concern. Stainless steel tumbler with standard powder coat.
Klean Kanteen Rise Tumbler is stainless steel with a powder-coat finish. No PFAS-specific claims or third-party verification available, but material composition suggests lower risk profile typical of reusable drinkware.
Shop Klean Kanteen on Amazon →Material
Stainless steel body, powder-coat finish
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.
The full breakdown
What it's made of and why it matters
The Rise Tumbler uses 18/8 stainless steel (304 grade), which is highly resistant to corrosion and leaching under normal beverage use. The powder-coat finish is a dry paint layer applied electrostatically to the exterior; it does not contact food or drink. Stainless steel itself does not require non-stick coatings like Teflon-type coating, eliminating fume risks associated with scratched non-stick cookware. The material is food-safe and commonly used in beverage containers without reported issues.
The brand's record and disclosure
Klean Kanteen has built its brand on reusable, durable bottles marketed as eco-conscious and chemical-free. The company does not widely publicize PFAS testing or certification, though its stainless steel and powder-coat design suggests lower PFAS risk than insulated double-wall tumblers (which may use PFAS-containing adhesives). No major safety recalls or contamination incidents are on record for Klean Kanteen drinkware. The brand is known for transparency about materials, though formal third-party certifications are not prominent.
How it compares in its category
Stainless steel tumblers are generally safer than plastic alternatives (which carry BPA/BPS leaching risk) or ceramic-glazed drinkware (which may contain lead in pigments). Compared to insulated tumblers from competitors like Hydro Flask or Yeti, the Rise Tumbler's single-wall design eliminates risks from adhesive-layer separation. It is simpler to clean and inspect than double-walled variants. The main trade-off is lack of insulation rather than safety.
If you buy it
Hand wash or place on the top rack of a dishwasher; the stainless steel will not be damaged by heat or water cycling. Avoid prolonged contact with acidic or salty beverages at temperatures above 160F (71C) if concerned about trace metal migration, though stainless steel leaching is minimal under typical use. Inspect the powder-coat finish regularly for chips or peeling; if the coating degrades significantly, replace the tumbler. Do not use in a microwave (stainless steel can arc), but oven or stovetop heating is safe.
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.”
Powder-coat finish degradation
Exterior powder-coat can chip or peel over years of use or aggressive washing; exposed stainless steel is non-toxic, but flaking particles should be removed. No lead or cadmium is known in standard industrial powder coats for beverage containers, but quality varies by batch.
Stainless steel trace metal leaching
18/8 stainless steel does not leach detectable amounts of chromium or nickel into neutral or mildly acidic beverages under normal use conditions. Highly acidic beverages (vinegar, citrus) or prolonged storage at elevated temperatures could theoretically increase leaching, but reported cases are rare.
Microplastic shedding
Stainless steel does not shed microplastics. This hazard applies to plastic containers, not metal ones.
Bacterial growth in crevices
Like all reusable tumblers, the lid seal and bottom threads can trap moisture and harbor bacteria if not cleaned thoroughly after each use. Stainless steel itself resists microbial colonization, but design complexity matters. Klean Kanteen lids are typically simple and dishwasher-safe, reducing this risk.
Thermal shock from temperature extremes
Stainless steel is thermally stable and will not warp or leach from sudden temperature changes (hot coffee followed by cold water). No reported incidents in single-wall stainless steel tumblers.
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 insulated travel drinkware 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.