Rambler Tumbler YETI
Low risk. Bare stainless steel tumbler with no known PFAS risk.
This tumbler is 18/8 stainless steel with no coating. Standard stainless steel drinkware presents minimal PFAS exposure risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
18/8 stainless steel, no coating
Lab data
No public lab test
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
What Rambler Tumbler YETI is made of, ingredients and materials
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.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
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’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
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
Bare stainless steel has no glaze or enamel layer. No published findings of heavy metal contamination in Yeti Rambler stainless steel.
Source, ATSDR ↗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.
How is this PFAS grade calculated?
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 have lower concern than alternatives, 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 present lower concern with stainless steel; the material does not release compounds at typical drinking temperatures and poses no burn risk from the material itself.
What is not known about PFAS in this product?
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Yeti 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 Rambler Tumbler YETI?
- stainless steel exterior, ceramic lining interior
- Ceramic coating degradation over time
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, plastic lid
- We found no PFAS statement from the brand
- Plastic lid polymer identity and leaching potential
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, no interior coating disclosed
- Silicone and plastic lid/valve leachables
3 hazards checked on this product, all on its full breakdown.
More insulated 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.