Hydro Flask Carryout Lunch Tote
Moderate concern; food-contact lining treatment unknown, check label first.
Hydro Flask does not disclose PFAS status for this lunch tote. The waterproof interior lining treatment is unspecified, creating uncertainty around water-repellent coating coatings commonly used in food containers.
The better-graded swap
Klean Kanteen
Klean Kanteen Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid
100/100 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
Recycled polyester exterior, waterproof-treated lining
Lab data
No public lab test
What Hydro Flask Carryout Lunch Tote is made of, ingredients and materials
The exterior is recycled polyester, which inherits processing residues and may contain residual dyes or spin finishes from its previous life. The waterproof-treated lining is the critical component, water-resistant finishes on fabric are typically applied via synthetic coatings, which historically rely on PFAS compounds (perfluorinated chemicals) to achieve durable repellency. Recycled polyester itself does not leach BPA or bisphenols, but the finish chemistry and any additives used in dyeing are unknown from public labeling.
What’s concerning
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
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.
PFAS
Waterproof fabric finishes on insulated totes historically use C6 or C8 PFAS compounds. Hydro Flask does not disclose the specific water-repellent coating chemistry; food-contact risk exists if lining abrades or if contents touch treated seams. See separate PFAS grading.
Source, ATSDR ↗Azo dyes in recycled polyester
Recycled polyester may retain or be re-dyed using azo compounds. While skin contact risk is low, some azo dyes can degrade to carcinogenic amines if the fabric is abraded internally and residues contact food repeatedly over months. No testing data available for this specific product.
Microplastics
Recycled polyester fiber can shed microfibers, especially where the lining is rubbed by food items. Direct ingestion is unlikely with solid foods, but beverages or high-moisture items stored long-term may collect lint. Risk is modest and shared by most synthetic-lined totes.
Source, EPA ↗Adhesive or coating leachables from lining-exterior bond
The waterproof lining is typically glued or heat-bonded to polyester. The adhesive chemistry is undisclosed. In warm or damp conditions, traces of uncrosslinked oligomers or plasticizers from adhesives can migrate into food contact, though evidence specific to this brand is not on record.
What’s reassuring
Formaldehyde / VOCs
Modern recycled polyester and waterproof finishes rarely use formaldehyde-based resins, having shifted to reactive fixatives and fluorinated compounds. No specific reports or recalls exist for Hydro Flask totes on this hazard, but disclosure would confirm.
Source, ATSDR ↗The full breakdown
The brand's record and disclosure
Hydro Flask has built reputation primarily on insulated drinkware and does not publicly disclose material safety certifications, chemical coatings used, or PFAS content for soft goods like this tote. The brand has not signed onto PFAS-free commitments or published third-party testing for textile linings. No major safety recalls or controversies are documented for Hydro Flask food-contact products, but transparency on waterproof treatment chemistry remains absent.
How it compares in its category
Lunch totes typically use either uncoated natural fibers (cotton, linen), standard synthetic fabrics with no water treatment, or PVC-lined options (worse PFAS exposure). Recycled polyester with waterproof finish sits in a middle zone, better than virgin PVC linings, but the exact repellent chemistry is a gray box. Competitors like Patagonia or Peak Design often disclose water-repellent coating (water-repellent coating) formulations or offer PFAS-free alternatives; Hydro Flask does not.
If you buy it
Hand wash before first use to reduce potential finish residues and loose dyes from manufacturing. Use only for room-temperature or cold food storage; do not microwave or heat contents while in the tote, as warmth can accelerate any coating leaching. Inspect the lining annually for tears or peeling; discontinue use if waterproof layer visibly degrades, as separation may expose internal adhesives. Store dry to prevent mold growth inside the lining.
What we don’t know
- Basis
- Model estimate, 62% 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 Lunch Boxes
Klean Kanteen
Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid
- Stainless steel body, silicone gasket lid seal
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation
3 hazards checked on this product. See all of them.
Snapware
Meal Box Glass
- borosilicate glass
- We found no PFAS statement from the brand
- Leaching from glass matrix or lid seals
2 hazards checked on this product. See all of them.
OXO
Steel Pop Big Square Short - 2.8 Qt/2.6 l
- Stainless steel container, no surface treatment
- Lid/gasket polymer leaching
3 hazards checked on this product. See all of them.
More lunch boxes 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.