LocknLock ToGo 2-Tier Stainless Lunch Box, 500ml + 800ml, Snap Lid, Silicone | Multicolor
Lower PFAS concern. Stainless and silicone rarely treated with PFAS.
Stainless steel lunch box with silicone seals poses lower PFAS risk. No special coatings or water-resistance treatments typical. Brand disclosure silent on PFAS.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel containers, silicone seals, snap lids
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What LocknLock ToGo 2-Tier Stainless Lunch is made of, ingredients and materials
This lunch box uses food-grade stainless steel (likely 18/8 or 304 grade) for the containers, which is chemically inert and does not leach metals under normal use. Silicone seals and snap lids are elastomers that resist degradation better than rubber or PVC alternatives. Stainless steel and silicone are both non-porous, reducing bacterial biofilm accumulation compared to ceramic or plastic storage.
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.
Silicone seal degradation over time
Silicone gaskets can lose elasticity, crack, or develop odor after years of use or repeated heating cycles. Replacement seals are typically available but not always included; check Lock & Lock's parts availability for your model year.
Stainless steel corrosion and pitting
Lower-grade stainless steel or poor manufacturing can develop surface pitting or rust spots when exposed to acidic foods (vinegar, citrus) or high-chlorine environments over extended periods. No recalls on record for this model, suggesting standard grade metallurgy.
Snap lid mechanical failure
Plastic snap hinges and latch points can crack or lose tension with repeated opening/closing cycles, especially if dropped or forced. This is a durability issue rather than chemical hazard but may lead to food spillage or lid seal loss.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Bacterial growth in seal channels
No documented outbreaks linked to this product. Silicone seals are smoother and less porous than rubber, reducing crevice buildup; proper washing and air drying between uses minimizes risk.
Heavy metals
Stainless steel 304/18-8 grade contains nickel (8-10%) and chromium, which are not known to leach into food under normal storage conditions. No reports of elevated metal exposure from this brand's containers.
Source, FDA ↗The full breakdown
The brand's record and disclosure
Lock & Lock has no documented safety recalls in major US or EU databases for this product line. The brand does not publish detailed material sourcing or chemical transparency reports, which is typical for mainstream food container manufacturers but limits independent verification. No third-party certifications (BPA-free labeling, etc.) are prominently advertised for this model, though stainless steel inherently avoids BPA concerns. No established controversies regarding this product category from the brand.
How it compares in its category
Stainless steel lunch boxes are not a material linked to PFAS, avoiding plastic leaching hazards. This product sits above cheaper plastic alternatives (which may contain BPA or phthalates) but is comparable in safety to other stainless steel competitors like Bentgo or EarthHero. Silicone seals are preferable to rubber or vinyl gaskets, which can off-gas over time.
If you buy it
Hand wash with warm soapy water; avoid prolonged dishwasher cycles if the silicone seals show wear, as heat cycling degrades elastomers. Do not use on direct heat; stainless steel containers are storage-only and not designed for stovetop or oven use. Inspect silicone seals annually for cracks, discoloration, or sticky residue; replace if visible degradation occurs. This product is suitable for hot and cold foods once cooled to safe temperatures.
What we don’t know
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Lock & Lock has made none
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.
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.