Yeti · Insulated Drink Tumblers
YETI Rambler 20 oz Stackable Cup in Olive/King Crab Orange
Low risk drinkware, but coating details not disclosed.
YETI Ramblers use stainless steel with powder coating. Coating composition isn't publicly specified, creating uncertainty about PFAS in the finish.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel with powder coat finish
Lab data
No public lab test
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What YETI Rambler 20 oz Stackable Crab Orange is made of, ingredients and materials
The Rambler cup is constructed from 18/8 stainless steel (18% chromium, 8% nickel), which resists corrosion and does not leach metals into beverages under normal use. The exterior powder coat finish provides durability and aesthetics but its exact formulation is proprietary. Stainless steel is chemically stable across hot and cold beverages and is considered a low-leaching material for food contact applications.
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.
Powder coating composition (unspecified)
Yeti does not disclose the polymer resin or curing agents in the powder coat. Some industrial powder coatings contain epoxy or polyester resins that may off-gas volatile compounds during manufacturing; consumer exposure after purchase is minimal if curing is complete at the factory.
Coating degradation and flaking
Powder coatings can chip or peel with impact, rough handling, or prolonged dishwasher cycles. If fragments become dislodged into beverages, ingestion of paint particles is a choking or GI irritant risk, though the likelihood is low if the cup is inspected regularly.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Nickel leaching (stainless steel)
18/8 stainless steel is highly resistant to corrosion and nickel migration under neutral pH conditions. Risk only emerges if the powder coat is breached and the exposed metal contacts acidic beverages for extended periods; no incidents reported for intact Rambler cups.
Thermal stability of lid seals
The Rambler includes a plastic lid; the specific polymer (often polypropylene or acrylic) is not disclosed. Under normal use (hot or cold beverages), no leaching is documented, but extreme heat or repeated dishwasher exposure may degrade seals over time.
Heavy metals
No recalls or test results document the presence of lead, cadmium, or other contaminants in finished Rambler cups. Yeti products are manufactured in facilities subject to general consumer product safety standards but are not certified lead-free.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Yeti does not publicly disclose detailed ingredient lists for coatings or manufacturing processes, which limits independent verification of chemical composition. No major recalls or safety controversies have been documented for Rambler drinkware. The company markets products as durable and safe but has not pursued third-party certifications (e.g., FDA pre-approval letters or NSF certification) that would provide additional assurance on coating safety.
How it compares in its category
Stainless steel drinkware is not a material linked to PFAS, unlike some plastic alternatives (which may leach BPA or phthalates) or ceramic with unknown glazes. The Rambler competes against similar insulated cups from Hydro Flask, Klean Kanteen, and Contigo; most rivals also use stainless steel with proprietary powder coatings and do not fully disclose coating chemistry. Yeti's market position does not distinguish it on transparency, but material class is among the lowest-risk options for reusable drinkware.
If you buy it
Hand wash rather than dishwasher to minimize thermal stress on the powder coat and extend its lifespan. Avoid prolonged contact with acidic beverages (vinegar, citrus juice) which may gradually etch the coating. Inspect the cup periodically for chips or peeling; if the coating is visibly damaged and metal is exposed, discontinue use to avoid nickel leaching in acidic conditions. Do not expose to extreme temperatures (e.g., boiling water poured directly) as thermal shock may compromise the seal or coating adhesion.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% 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 YETI Rambler 20 oz Stackable Cup in Olive/King Crab Orange?
- Stainless steel bottle, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Powder-coat cap degradation over time
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle, plastic cap and silicone gasket
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation and leaching
3 hazards checked on this product, all on its full breakdown.
More insulated drink tumblers 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.