Hydro Flask · Insulated Travel Mugs
Hydro Flask All Around Travel Tumbler
Stainless tumbler with no known PFAS-prone coatings.
Stainless steel without nonstick or water-repellent coatings that typically contain PFAS. No public PFAS disclosures or certifications from brand.
The better-graded swap
Thermos
Thermos 18 oz. Icon Vacuum Insulated 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 with powder-coated exterior
Lab data
No public lab test
What Hydro Flask All Around Travel Tumbler is made of, ingredients and materials
The Hydro Flask All Around Travel Tumbler uses food-grade 18/8 stainless steel as its primary container material, which does not leach metals under normal use or temperature exposure. The exterior is powder-coated (a dry plastic resin finish), which is chemically inert once cured and does not contact beverages. Stainless steel is one of the lowest-risk cookware materials because it is passive at room temperature and does not degrade into the contents under typical drinking conditions.
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.
Powder-coat degradation
The exterior powder coating can chip or peel if dropped or banged repeatedly, exposing bare stainless steel or releasing dried resin particles. This is a mechanical risk, not a chemical one, but replacement is warranted if visible damage occurs.
Stainless steel pitting corrosion
Prolonged contact with salt, chlorine, or strong acids can cause pitting in stainless steel, though 18/8 grade is highly resistant. For typical water, coffee, and tea use, this risk is negligible; sports drinks or saltwater require prompt rinsing.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Lead
No recalls or reports document heavy metal contamination in Hydro Flask powder coatings. Food-contact powder coats are regulated under FDA guidelines and do not typically contain intentional lead or cadmium.
Source, ATSDR ↗Aluminum leaching
This model uses stainless steel as the beverage contact surface, not aluminum, so aluminum leaching is not a concern.
Teflon-type coating fume risk
Hydro Flask does not use Teflon-type coating (Teflon) or non-stick coatings on this tumbler model; the powder coat is not Teflon-type coating-based.
The full breakdown
The brand's record and disclosure
Hydro Flask has published material specifications for its products and does not use Teflon-type coating or other known fluorinated coatings in this model. The brand does not publicly claim BPA-free status, though the powder coat itself is not a known source of BPA. Hydro Flask has no major recalls on record for this tumbler model related to chemical leaching or coating failure. The company's silence on PFAS is typical for the beverage tumbler category but does not indicate active use of PFAS-based water repellents.
How it compares in its category
This product sits in the premium stainless steel tumbler segment alongside brands like S'well and Yeti. Unlike some lower-cost alternatives that use aluminum liners with ceramic or proprietary coatings (which carry coating-degradation risks), the all-stainless design here eliminates that vulnerability. Most competing products in this price range use similar 18/8 stainless construction, making this category-typical rather than differentiated for safety.
If you buy it
Wash by hand or on gentle dishwasher cycles to avoid abrasive wear on the powder coat; the coating is durable but not indestructible. Do not leave acidic beverages (citrus, vinegar) sitting for extended periods, as stainless steel can pit under prolonged acid exposure, though this risk is low for typical daily use. Replace the tumbler if the powder-coated exterior is visibly chipped or peeling to prevent any potential powder ingestion. Store dry to minimize water spotting and preserve the finish.
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
- Hydro Flask 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.