The Best Stainless Steel Lunch Boxes of 2026
All 75 options with stainless steel in their construction in our lunch boxes database, graded Bad to Excellent and ranked lowest risk first. 74 earn a buy-worthy grade.
Why Klean Kanteen Double Wall Vacuum Insulated wins, and what it beats
Every grade on this page is one sum. A category starts from a baseline, each disclosed material or coating adds risk points, and each thing the brand or a third party has published takes them away. Below is that sum for the winner, then for 3 products it beats, so you can see exactly where the 75 points between the top and the bottom of this stainless steel lunch boxes ranking come from.
The winner
Made of Stainless steel body, silicone gasket lid seal.
- +25Category baseline. The starting point for this type of product, before anything specific to this product is counted.
- -10Brand-stated PFAS-free. The brand states this product is PFAS-free. We have not verified the claim.
- -20Bare uncoated material. Recorded as a bare, uncoated material with no surface coating or treatment.
What the grade does not fix. Nothing specific to this product adds risk, so what remains is the category baseline that every product here starts from, and our graders recorded 3 other hazards on it. See the full breakdown.
What it beats, and why
What puts it behind. No PFAS disclosure, +15 points. No public statement from the brand about PFAS in this product. The winner carries no such factor.
Made of Stainless steel container, no surface treatment.
- +25Category baseline
- +15No PFAS disclosure
- -20Bare uncoated material
20risk points, a grade of 80
![Lock & Lock [Lock & Lock] Stainless Steel Thermal Dosirak](/img/10754/lock-lock-lock-lock-stainless-steel-thermal-dosirak)
What puts it behind. No PFAS disclosure, +15 points. No public statement from the brand about PFAS in this product. The winner carries no such factor.
Made of stainless steel, no coating specified.
- +25Category baseline
- +15No PFAS disclosure
- -10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.
30risk points, a grade of 70
What puts it behind. Waterproof / stain-resistant treatment, +35 points. Water-repellent coating treatments have historically used PFAS. The winner carries no such factor.
Made of stainless steel with leak-resistant gasket/seal.
- +35Waterproof / stain-resistant treatment
- +25Category baseline
- +15No PFAS disclosure. No public statement from the brand about PFAS in this product.
75risk points, a grade of 25
No product on this page was physically tested by us. Every number above comes from published materials, ingredient and coating disclosures, certifications and brand statements, scored on one public rubric. Formulations change without notice, so check the current product listing before buying.
All 30 stainless steel lunch boxes, best graded first
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.
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.
304 Stainless Steel Refrigerator Sealed Pyxis L Size Rectangular Bento Pyxis Lunch Pyxis With Lid Organizer
- 304 stainless steel container with silicone or rubber gasket lid seal
- Nickel leaching from 304 stainless steel
3 hazards checked on this product. See all of them.
Bentgo Stainless Steel Insulated Food Container
- stainless steel exterior, insulated core
- Silicone gasket and plastic lid degradation
3 hazards checked on this product. See all of them.
Ello
Cello Stainless Steel Lunch
- Stainless steel, bare uncoated
- We found no PFAS statement from the brand
- Gasket and seal integrity
Essaware
Lunch Mate - Stainless Steel - Reusable Sandwich Container - Homeplace Market
- Stainless steel, bare uncoated
- We found no PFAS statement from the brand
- Nickel leaching
2 hazards checked on this product. See all of them.
Lock & Lock
LocknLock Stainless Steel Food Storage Containers with Lids, Metal Lunch Boxes, Leak-Proof, Microwave, Freezer and Dishw
- Stainless steel and metal
- We found no PFAS statement from the brand
- Silicone gasket degradation
2 hazards checked on this product. See all of them.
Lock & Lock
LocknLock ToGo 2-Tier Stainless Lunch Box, 500ml + 800ml, Snap Lid, Silicone | Multicolor
- stainless steel containers, silicone seals, snap lids
- We found no PFAS statement from the brand
- Silicone seal degradation over time
3 hazards checked on this product. See all of them.
Planetbox
Launch Stainless Steel Lunch Box
- Stainless steel container, no coating disclosed
- We found no PFAS statement from the brand
- Rubber gasket degradation
2 hazards checked on this product. See all of them.
Prepara
Latchlok Click Stainless Steel Food Storage Container Set
- stainless steel with silicone gasket seals
- We found no PFAS statement from the brand
- Silicone gasket degradation over time
2 hazards checked on this product. See all of them.
Rubbermaid
24 Pc Easy Find Lid Containers & 8 Pc Stainless Container Set
- Polypropylene and stainless steel (bare, uncoated)
- We found no PFAS statement from the brand
- Plastic degradation and microplastic shedding
2 hazards checked on this product. See all of them.
S'well
Stainless Steel Bento Box Onyx
- stainless steel, silicone seals
- Silicone seal degradation
2 hazards checked on this product. See all of them.
Small Plain Metal Lunch Box
- Bare stainless steel or painted metal
- We found no PFAS statement from the brand
- Stainless steel ion leaching (nickel, chromium)
2 hazards checked on this product. See all of them.
Sistema
Bentgo Kids Stainless Steel Lunch Box
- stainless steel with no reported coatings
- We found no PFAS statement from the brand
- Gasket/seal degradation and bacterial growth
2 hazards checked on this product. See all of them.
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
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
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
2 hazards checked on this product. See all of them.
Trueware
Stainless Steel Lunch Box With 2 Steel Containers
- Stainless steel containers and box
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel alloy
3 hazards checked on this product. See all of them.
Zojirushi
Ms. Bento Stainless Lunch Jar
- Stainless steel body, polypropylene seals/lids
- Polypropylene seal degradation under heat
2 hazards checked on this product. See all of them.
Zojirushi
SL-XE20AD Classic Stainless Lunch Jar
- Stainless steel interior and exterior, no nonstick or waterproof coatings
- Nickel leaching from stainless steel
2 hazards checked on this product. See all of them.
Bentgo
Kids Prints Stainless Steel Lunch Box
- stainless steel body, plastic lid/components
- We found no PFAS statement from the brand
- Degradation of plastic lid and seals over time
2 hazards checked on this product. See all of them.
Bentgo MicroSteel Lunch Box
- Stainless steel with silicone gaskets
- Silicone gasket degradation
2 hazards checked on this product. See all of them.
Stainless Steel Lunch Box with Lock Lid,Portable Bento Box with Handle,Round Thermal Food Container,Multi-Purpose Storag
- stainless steel body, plastic locking lid and handle
- We found no PFAS statement from the brand
- Plastic lid and handle degradation over time
2 hazards checked on this product. See all of them.
Planetbox
Rover Stainless Steel Lunch Box Set
- stainless steel container, BPA-free plastic compartments
- We found no PFAS statement from the brand
- BPA & bisphenols
2 hazards checked on this product. See all of them.
Prepara
Latchlok Click Stainless Steel Container
- stainless steel, plastic latch and silicone gasket
- We found no PFAS statement from the brand
- Silicone gasket degradation
2 hazards checked on this product. See all of them.
Ozark Trail
40 oz Stainless Steel Lunch Box
- Stainless steel body, uncoated interior
- We found no PFAS statement from the brand
- Nickel leaching (from 304 stainless steel alloy)
3 hazards checked on this product. See all of them.
Esquirla Lunch Box Stainless Steel Leakproof Rectangle Portable Food Container Reusable Stackable Meal Prep Container wi
- stainless steel and silicone gaskets
- We found no PFAS statement from the brand
- Silicone gasket degradation
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
4 hazards checked on this product. See all of them.
Mainstays
Food Container Reusable Insulated Stainless Steel
- stainless steel interior, insulated construction
- We found no PFAS statement from the brand
- Gasket/seal material degradation
2 hazards checked on this product. See all of them.
Lock & Lock
Lock&Lock Insulated Lunch Box, Stainless Steel Lunch Box, Insulated Bowl For Baby Food, Lunch Box For Elementary School
- stainless steel body, standard plastic lids and seals
- We found no PFAS statement from the brand
- BPA & bisphenols
3 hazards checked on this product. See all of them.
Every material, ranked together, is in the full lunch boxes ranking →