YETI Rambler · Portable Water Bottles
YETI Rambler Bottle 26 oz. Grasshopper
Low risk. Stainless steel unlikely PFAS intentionally.
YETI Rambler features stainless steel double-wall vacuum insulation without inherent PFAS. Brand offers no public disclosure or testing on lid seals.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel double-wall vacuum insulation
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What YETI Rambler Bottle 26 oz. Grasshopper is made of, ingredients and materials
The YETI Rambler 26 oz uses 18/8 stainless steel (304 grade) as its primary contact surface, with a vacuum-sealed double-wall design that eliminates direct contact between liquid and any adhesives or coatings. Stainless steel is chemically inert at normal use temperatures and does not leach metals under typical drinking conditions. The lid and gasket are typically plastic (PP or silicone), which may contact liquid but are standard food-safe polymers with no known issues in this application.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial growth and biofilm
The rubber gasket and threaded areas can trap moisture and harbor bacteria if not dried thoroughly between uses. This is a hygiene issue rather than chemical hazard; rinse and air-dry the lid separately.
Plastic lid and gasket degradation
The lid gasket material (typically silicone or synthetic rubber) may degrade, discolor, or absorb odors over time, especially with hot liquids or acids. No chemical leaching has been documented, but replacement is advisable if odor persists after washing.
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
Stainless steel has no applied coating; the material itself is the contact surface. No reports of rust, corrosion, or leaching in normal use for this product line.
Heavy metals
18/8 stainless steel is food-safe and does not migrate nickel or chromium at concentrations above regulatory limits under normal use. No recalls or test reports exist for YETI Ramblers on this hazard.
Source, FDA ↗Off-gassing or volatile organic compounds
Stainless steel and standard food-grade plastics do not off-gas at room temperature or typical beverage temperatures. No odor complaints attributable to chemical release are on record.
The full breakdown
The brand's record and disclosure
YETI does not publicly disclose detailed material testing or third-party certifications for the Rambler line beyond FDA food-contact compliance claims. The brand has no recorded product recalls related to chemical leaching or coating degradation. YETI's silence on PFAS use in manufacturing is typical for consumer drinkware brands; no public evidence suggests PFAS intentional inclusion in the stainless steel body.
How it compares in its category
Note, this product is a drinkware bottle, not a water filter; the category assignment appears mislabeled. Among insulated bottles, YETI Ramblers occupy the premium segment and perform comparably to Hydro Flask and S'well in material safety. Stainless steel bottles have lower concern for BPA, phthalates, and microplastic shedding compared to some plastic alternatives. The vacuum seal design is superior to single-wall or thin aluminum bottles for avoiding leaching.
If you buy it
Hand wash or use top-rack dishwasher; avoid extreme temperature shock (very hot liquid immediately followed by ice). Inspect the rubber gasket annually for cracks or odor, replacing if degraded. Stainless steel is durable for 5+ years with normal use. Do not assume the lid is equally inert; replace plastic lids if they show discoloration, cracks, or off-odors.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- YETI Rambler has made none
Formulations change between production runs, so check the current label. How we grade.
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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.