Owala SmoothSip Travel Mug
Lower concern. Stainless steel and standard plastic, no known PFAS sources.
Owala SmoothSip is stainless steel with a BPA-free plastic lid. No Teflon-type coating nonstick or water-resistant treatments documented.
The better-graded swap
Thermos
Thermos Stainless Steel Mug
80/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Stainless steel, BPA-free plastic lid
Lab data
No public lab test
What Owala SmoothSip Travel Mug is made of, ingredients and materials
The Owala SmoothSip is constructed from food-grade stainless steel (typically 18/8), which is chemically inert and does not leach metals or degrade under normal use. The lid is BPA-free plastic, likely polypropylene or acrylic, which avoids the endocrine-disruption concern of older polycarbonate designs. Stainless steel travel mugs have no known risk of aluminum leaching (unlike bare aluminum) or ceramic-coating deterioration, since there is no applied coating to wear away.
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.
Lid seal integrity and maintenance
Plastic lids may warp or lose sealing effectiveness over repeated thermal cycles, but failure is mechanical rather than chemical. This does not introduce toxins but may compromise insulation or allow spillage.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Plastic lid degradation
No documented chemical leaching from the BPA-free plastic lid under normal use conditions. Mechanical wear (cracking, clouding) may occur over time but poses no toxicological risk.
Stainless steel leaching
Food-grade stainless steel (18/8) is chemically stable in contact with water and beverages at typical use temperatures. Nickel migration from stainless is extremely low in contact with non-acidic liquids.
Coating or enamel degradation
The SmoothSip has no applied ceramic, enamel, or glazed coating on the interior, eliminating the primary risk of lead or cadmium exposure. Exterior coatings (if present) do not contact beverages.
The full breakdown
The brand's record and disclosure
Owala is owned by Hydro Flask parent company Helen of Troy and has maintained a low profile on toxicology transparency; no major product recalls or safety violations are on public record for this model. The company does not publish detailed material sourcing or third-party testing summaries, which is typical for the budget travel-mug segment but limits independent verification. No established controversies regarding formaldehyde, heavy metals, or coating hazards have been documented.
How it compares in its category
Stainless steel travel mugs have lower concern than ceramic-coated or enameled competitors because they eliminate the primary hazard classes affecting those materials (lead or cadmium in glazes, coating flaking). The SmoothSip sits at a mid-market price point and material standard comparable to Hydro Flask and Contigo alternatives, all of which rely on the same inert stainless construction. Plastic lids are universal in this category and carry no elevated risk if not microwaved or exposed to very high heat.
If you buy it
Avoid microwaving the plastic lid and do not fill with boiling liquid immediately after opening in cold conditions, as thermal shock can stress the seal. Wash the lid by hand rather than dishwasher to extend plastic durability, though it is not a hazardous concern. Replace the lid if visible cracks develop, as this compromises the seal but does not create a chemical hazard. Stainless steel bodies are durable for years; no scheduled replacement is needed unless denting or dent-related insulation loss occurs.
What we don’t know
- Basis
- Model estimate, 75% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Owala has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Insulated Travel Mugs
Owala
FreeSip Sway Stainless Steel
- Stainless steel body, no interior coating disclosed
- Silicone and plastic lid/valve leachables
3 hazards checked on this product. See all of them.
Owala
Stainless Steel Straw Tumbler Route 66
- Stainless steel tumbler, bare uncoated
- Coating degradation and microplastic shedding from exterior print
3 hazards checked on this product. See all of them.
Thermos
18 oz. Icon Vacuum Insulated Stainless Steel Mug
- stainless steel exterior, vacuum insulation, stainless steel interior
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel
3 hazards checked on this product. See all of them.
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.