Do Thermos lunch boxes have PFAS?
Thermos lunch boxes average 75 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Thermos lunch boxes graded as of October 2026, above the 70 out of 100 median for the 43 other lunch boxes brands graded alongside it.
Thermos lunch boxes average Excellent on our four-band scale. 8 of the 8 we graded are worth buying. That is above 86% of the lunch boxes brands we grade.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Thermos lunch boxes worth buying Good or better, best-graded first
Thermos
Stainless Steel Food Jar
- Stainless steel body, plastic liner seal
- We found no PFAS statement from the brand
- Plastic seal degradation and microplastic shedding, If the plastic seal is heated repeatedly or exposed to…
2 hazards checked on this product. See all of them.
Thermos
Stainless Steel Food Jar w-Folding Spoon
- stainless steel body, uncoated interior
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel, 300-series stainless steel contains 8-12% nickel. Under prolonged…
2 hazards checked on this product. See all of them.
Thermos
Stainless Steel Vacuum Insulated Food Jar
- stainless steel, vacuum-sealed, no coating
- We found no PFAS statement from the brand
- Stainless steel corrosion and nickel leaching, Food-grade stainless steel (304/18-8) leaches negligible…
2 hazards checked on this product. See all of them.
Thermos
Fresh Stainless Steel 1100ml Lunch Box in Line Black
- Stainless steel body, plastic lid and seals
- We found no PFAS statement from the brand
- BPA & bisphenols, Plastic lid and gasket materials are not certified BPA-free by the brand. Standard…
4 hazards checked on this product. See all of them.
Thermos
Dual Compartment Lunch Box
- stainless steel, plastic, rubber gaskets
- We found no PFAS statement from the brand
- Microplastics, If plastic compartments are filled with hot liquids or heated foods well above 60C (140F)…
2 hazards checked on this product. See all of them.
Thermos
Lunch Lugger Cooler
- polyethylene foam insulation, plastic exterior, fabric lining
- We found no PFAS statement from the brand
- Microplastic shedding from degraded foam or plastic, Polyethylene foam can degrade into microparticles if…
3 hazards checked on this product. See all of them.
Thermos
12 Can Dual Lunch Box
- plastic exterior, foam insulation, metal/plastic lining
- We found no PFAS statement from the brand
- BPA & bisphenols, The interior plastic lining material type and manufacturing standard are not disclosed by…
4 hazards checked on this product. See all of them.
Thermos
Soft Lunch Box Upright
- polyester, nylon, foam insulation
- We found no PFAS statement from the brand
- Formaldehyde / VOCs, Polyester fabric may be finished with formaldehyde-based resins for wrinkle or water…
4 hazards checked on this product. See all of them.
Better lunch boxes from other brands
Graded higher than the Thermos average of 75.
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.
The same question, asked of the other lunch boxes brands
Best average grade first. Thermos averages 75.
See every Thermos product we grade on the Thermos brand page, or the full lunch boxes ranking.