Owala FreeSip Tumbler
Lower concern. Stainless steel tumbler without nonstick or water-resistant coatings.
Owala FreeSip is a stainless steel tumbler with plastic lid and silicone gasket. No Teflon-family coating coatings or water-repellent treatments identified.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel and plastic components
Lab data
No public lab test
What Owala FreeSip Tumbler is made of, ingredients and materials
The Owala FreeSip uses 18/8 stainless steel as its primary vessel material, which does not leach metals under normal use conditions and resists corrosion. Plastic components include the silicone-sealed lid, straw, and flip-top mechanism. These plastics are not reported to contact hot liquids directly during normal beverage storage, reducing leaching risk compared to single-use plastic bottles.
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.
BPA & bisphenols
Owala does not specify resin types or provide BPA-free certification from independent labs. Lid and straw plastics are not in contact with hot beverages during typical use, but unknown resin composition means leaching risk cannot be ruled out if manufacturing standards are not documented.
Source, FDA ↗Microplastic shedding from seals and straws
Silicone seals and plastic straws may degrade over time with repeated washing and thermal cycling. No published durability data exists for this product; wear patterns on seals could release microparticles into beverages if not replaced when visibly damaged.
Seal adhesive or glue outgassing
Adhesives used to bond plastic components or seals to the steel body are not disclosed. Low-volatility adhesives are standard in food-contact drinkware, but outgassing cannot be assessed without material safety data sheets from the manufacturer.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Stainless steel leaching
18/8 stainless steel (304-grade) does not leach nickel, chromium, or iron into neutral beverages under normal temperature storage. No hazard is established for this material class in drinkware applications.
Coating or nonstick degradation
The FreeSip tumbler does not use Teflon-type coating coatings, ceramic glazes, or enamel finishes. Interior and exterior are bare stainless steel, eliminating fume risk or coating flaking hazards.
The full breakdown
The brand's record and disclosure
Owala has not published detailed material disclosures or third-party certifications (BPA-free claims exist on product pages but lack independent verification). No recalls or established safety controversies are on record for the FreeSip line. The brand maintains minimal transparency on plastic resin types used in lids and straws, which is typical for the drinkware sector but limits independent assessment.
How it compares in its category
Stainless steel tumblers have lower concern for leaching compared to ceramic glazes, coated aluminum, and high-leaching plastics. The FreeSip is positioned as a mid-range alternative to insulated bottles like Hydro Flask and YETI. Its plastic components are more substantial than minimal-plastic competitors but comparable to most mainstream reusable tumblers.
If you buy it
Hand wash the plastic lid and straw components rather than dishwasher to extend plastic lifespan and reduce thermal stress; avoid storing very hot liquids (above 140F) for extended periods. Replace the silicone seal or straw if visible degradation occurs, as worn seals may shed microparticles. The stainless steel body itself requires minimal maintenance and will not degrade with normal use.
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
- Owala has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
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Owala
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- Coating degradation and microplastic shedding from exterior print
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Thermos
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- stainless steel exterior, vacuum insulation, stainless steel interior
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel
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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.