Yeti · Insulated Drink Tumblers & Travel Mugs
Rambler Tumbler YETI
Lower concern. Bare stainless steel tumbler, no known PFAS risk.
YETI Rambler Tumblers are primarily stainless steel construction without nonstick or water-resistant coatings that typically contain PFAS. Standard stainless steel drinkware presents minimal PFAS exposure concern.
Shop Yeti on Amazon →Material
18/8 stainless steel, no coating
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
cookware is a category where PFAS exposure is more common.
The full breakdown
What it's made of and why it matters
The Rambler Tumbler is constructed from 18/8 stainless steel, meaning 18% chromium and 8% nickel. This grade is food-contact approved and non-reactive with beverages and food. Unlike coated tumblers (ceramic, enamel, or polymer), bare stainless steel has no surface finish that can degrade, chip, or leach into contents. The material is stable across normal use temperatures (dishwasher safe, hot and cold liquids) and does not require any safety testing beyond material verification.
The brand's record and disclosure
Yeti does not publicly disclose detailed safety test reports or third-party certifications for the Rambler line on their website. The brand has not faced recalls or public safety allegations specific to this tumbler model. Yeti maintains silent positioning on PFAS use in manufacturing or components, which is typical for stainless steel manufacturers but limits transparency. No independent testing or regulatory findings of concern have been published for this product.
How it compares in its category
Bare stainless steel tumblers are among the safest options in the category, avoiding hazards tied to ceramic glazes (lead/cadmium), polymer coatings (Teflon-type coating fume risk), or interior epoxy linings (BPA exposure). Most premium insulated tumblers use similar 18/8 stainless construction, making this a category standard rather than a differentiator. Glass or ceramic interior alternatives carry their own coating risks, while plastic-lined options introduce polymer leaching concerns that stainless avoids entirely.
If you buy it
Use normal dishwasher cycles; stainless steel is highly durable and resistant to corrosion under standard conditions. Avoid abrasive scrubbers that may dull the finish but do not compromise safety. The tumbler has no moving seals or gaskets that require replacement on a schedule. Hot beverages are safe; stainless steel does not release compounds at typical drinking temperatures and poses no burn risk from the material itself.
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.”
Coating degradation and leaching
This product has no coating, enamel, or ceramic layer, eliminating the primary failure mode in coated tumblers. Risk does not apply.
Aluminum leaching
18/8 stainless steel contains no aluminum. This hazard is irrelevant to this product.
Lead or cadmium in glazes or enamels
Bare stainless steel has no glaze or enamel layer. No published findings of heavy metal contamination in Yeti Rambler stainless steel.
Teflon-type coating fume risk from nonstick coatings
This tumbler does not use Teflon-type coating or any nonstick polymer coating. Risk does not apply to bare stainless construction.
Nickel leaching from stainless steel
18/8 stainless steel contains 8% nickel, which can migrate into acidic or high-salt liquids in trace amounts over extended contact. Established in scientific literature but at levels below dietary concern for most users; individuals with severe nickel sensitivity may notice reactions with prolonged contact (e.g., holding the rim against lips for hours). No recalls or adverse event reports specific
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 drink tumblers & travel mugs 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.