Lock & Lock · Food Storage Containers
LocknLock 9-Piece Twist-Lid Canister Storage Set
Lower PFAS concern for food storage; rigid plastic containers rarely use Teflon-family coating, but no brand transparency.
Lock & Lock twist-lid canisters are rigid plastic storage containers with no known PFAS-prone features like nonstick coatings or water-resistant treatments. The brand makes no PFAS claims or disclosures. While the material type itself poses lower concern, absence of third-party verification leaves some uncertainty.
Shop Lock & Lock on Amazon →Material
Plastic (polypropylene/acrylic) with snap-lock lids
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
food packaging is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
LocknLock canisters are molded polypropylene (PP) with acrylic or polycarbonate snap-lock lids. Polypropylene is a commodity plastic with a high melting point (around 165°C) and low migration of additives at room temperature. The rigid structure minimizes contact stress, reducing any tendency for monomers or plasticizers to leach into dry foods. Unlike soft plastics, PP does not require phthalates or BPA to achieve flexibility.
The brand's record and disclosure
Lock & Lock is a South Korean manufacturer with decades in food-storage containers. The brand does not publicly disclose detailed chemical composition or third-party testing for additives. No significant product recalls or health complaints linked to these containers appear in public records. The company has not made transparent statements on PFAS or other legacy additives, which reflects typical silence in the rigid food-storage category rather than evidence of risk.
How it compares in its category
Rigid PP canisters like this are among the safer choices for dry food storage, with lower chemical-leaching risk than soft plastics, glass lids, or metal containers with polymeric coatings. Glass and stainless-steel alternatives eliminate polymer risk entirely but are heavier and more fragile. Lock & Lock's product quality and seal design are competitive with Rubbermaid and OXO in the mid-market segment.
If you buy it
Store dry goods only; avoid prolonged contact with oils, alcohols, or acidic foods, which can degrade PP over decades. Do not microwave or expose to heat above 60°C for extended periods. Check lids and seals annually for cracks, discoloration, or warping; replace if degraded. Hand-wash in cool water; dishwasher use is safe but may accelerate lid wear.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
BPA/BPS leaching
Polypropylene does not require BPA or BPS as an additive. No public reports of BPA migration from Lock & Lock rigid canisters exist.
Phthalate migration
Rigid PP formulations do not use phthalate plasticizers. This product is not a source of phthalate exposure.
Microplastic shedding
Long-term UV exposure or mechanical stress (repeated snapping) of lids may cause micro-wear. Risk is minimal for indoor dry-storage use but increases if containers are reused for 10+ years or exposed to sunlight.
Lid adhesive or colorant toxicity
No documented cases of toxins in the snap-locking mechanism or pigments used in Lock & Lock canisters. Standard food-contact-approved adhesives and dyes are typical in this price segment.
Degradation and particulate contamination
After 10-15 years of use, PP can become brittle and may shed particles into stored food, especially if lids are forced or containers exposed to heat. Replacement every 5-10 years minimizes this risk.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Food Storage Containers
Caraway
Food Storage Set
Glass containers with plastic lids
Lower concern; glass + plastic lids with stated PFAS-free position, but no third-party verification of lid material.
⚠Risky category by default
Caraway
Home 9-Piece Mini Food Storage Set
Borosilicate glass containers with plastic lids
Lower-concern option; glass containers avoid PFAS coatings, but verify lid material before purchase.
⚠Risky category by default
Caraway
Cream 6.6-Cup Non-Stick Glass Food Storage Container with Lid
borosilicate glass with non-PFAS lid
Lower PFAS concern, glass container with stated non-PFAS lid, though third-party verification absent.
⚠Risky category by default
More food storage containers 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.