Ozark Trail · Insulated Drink Tumblers
Ozark Trail 40 oz Insulated Stainless Steel Tumbler
Lower concern; bare stainless steel has no known PFAS risk.
This Ozark Trail tumbler is bare stainless steel with no documented coatings, nonstick finishes, or waterproofing. Uncoated stainless steel carries minimal PFAS concern compared to coated drinkware.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel tumbler, no nonstick or waterproof coating documented
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Ozark Trail 40 oz Insulated Stainless is made of, ingredients and materials
The Ozark Trail 40 oz tumbler is constructed from stainless steel, typically 18/8 or similar food-grade alloy with no applied nonstick, enamel, or polymer coating. Stainless steel itself does not leach harmful substances into beverages under typical storage or use conditions. The interior and exterior surfaces are the primary contact points; the material's stability means you avoid the degradation risks associated with coated cookware or plastic-lined containers.
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.
Gasket/seal material degradation
The tumbler's lid and interior seal are typically silicone or polymer; these components are not detailed by Ozark Trail and may degrade or shed microparticles with heavy use or heat exposure, though no specific incidents are reported.
Double-wall integrity loss
The vacuum-seal between walls can fail with age or impact, though this is a durability issue rather than a direct chemical hazard. Failure does not release toxic substances but may allow water ingress and bacterial growth in the sealed space.
Corrosion under certain liquid exposure
Prolonged contact with highly acidic drinks (pH below 3.5) or saltwater may cause pitting corrosion in lower-grade stainless alloys over months to years; this is a material degradation risk rather than acute toxicity.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Stainless steel leaching (nickel, chromium)
Food-grade stainless steel does not leach measurable nickel or chromium under normal beverage storage. The passivation layer prevents corrosion and ion release unless the surface is damaged or exposed to extreme acidity for prolonged periods.
Lid coating or print contamination
If the lid includes printed graphics or decorative coating, the composition is undisclosed; stainless steel alone poses no risk. Any applied finishes should be verified for heavy-metal-free ink if this concerns you, though no recall or test failure is on record.
The full breakdown
The brand's record and disclosure
Ozark Trail (Walmart's house brand) does not publish detailed material safety certifications or third-party test reports for this tumbler. The brand has no documented recalls or safety controversies specific to this product line. Given the simplicity of uncoated stainless steel, formal disclosure is less critical than it would be for coated or composite products, though transparency remains absent.
How it compares in its category
This tumbler occupies the budget end of the insulated drinkware market. Premium competitors (Yeti, Hydro Flask) often highlight material sourcing and testing; Ozark Trail relies on the inherent safety of stainless steel without added marketing. The lack of interior coating or colorful enamel eliminates a category of common hazards (lead in glazes, Teflon-type coating fume risk) present in some lower-cost alternatives with decorative finishes.
If you buy it
Hand wash or use gentle dishwasher cycles to avoid damage to the double-wall seal integrity. Do not expose to extreme heat sources (direct flame, prolonged oven use above 160°F) as this can compromise insulation. Inspect the seal periodically for separation or corrosion; stainless steel is durable but the gasket or lid components may degrade first. Avoid storing acidic beverages (citrus, vinegar) for extended periods, as even stainless steel can develop pitting over years of exposure.
What we don’t know
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Ozark Trail has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Insulated Drink Tumblers
Klean Kanteen
20oz TKWide with Café Cap, Tofu
- 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. See all of them.
Klean Kanteen
16oz Rise Tumbler
- 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. See all of them.
Klean Kanteen
Insulated TKWide Cap
- 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. See all of them.
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.