Prep Naturals · Food Storage Containers
PrepNaturals 5 Pack 30 oz Glass Meal Prep Containers
Lower PFAS concern, glass meal prep containers pose minimal risk unless lids contain undisclosed coatings.
PrepNaturals' glass meal prep containers are made from borosilicate glass, a well-established PFAS-free material. The main risk is plastic lids, which the brand does not specify or disclose coating details for.
Shop Prep Naturals on Amazon →Material
borosilicate glass containers with plastic lids
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
No PFAS disclosure
No public statement about PFAS in this product.
Category baseline
food packaging is a category where PFAS exposure is more common.
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
The full breakdown
What it's made of and why it matters
PrepNaturals containers are borosilicate glass, a chemically inert material that does not leach into food across normal temperature ranges. The lids are plastic (polypropylene or similar) and snap onto the glass rim rather than sealing with gaskets, which reduces contact between food and polymer. Borosilicate is more durable and temperature-resistant than standard soda-lime glass, making it suitable for freezer, microwave, and oven use up to stated limits.
The brand's record and disclosure
Prep Naturals maintains a silent stance on PFAS in product documentation, offering no explicit assurance about lid coatings or manufacturing processes. The brand does not advertise third-party safety certifications (BPA-free labeling is common but unverified in public materials). No recalls or documented safety incidents are on record for this specific container line. The company targets the meal-prep consumer base with minimal regulatory transparency.
How it compares in its category
Glass meal-prep containers occupy a middle ground: safer than plastic-only alternatives (lower chemical leaching risk) but more breakable and heavier than polypropylene. Borosilicate glass is preferred over standard glass for durability. Many competitors (Rubbermaid, Pyrex, Sistema) also use glass bodies with plastic lids and do not disclose PFAS testing; PrepNaturals is typical in this regard, neither leading nor lagging on transparency.
If you buy it
Store acidic foods (citrus, vinegar-based dressings) separately from containers for prolonged periods to prevent any microscopic glass interaction, though risk is minimal. Do not exceed the manufacturer's heat limits (typically 400°F for oven, check labeling). Replace lids if they become cloudy, cracked, or develop odor, as degraded plastic may release compounds. Hand-wash lids rather than dishwashing to extend their lifespan and reduce plastic fatigue.
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/plasticizer leaching from lids
Plastic lids are not specified as BPA-free in available product documentation. While polypropylene typically has lower BPA risk than polycarbonate, heat exposure (microwave, hot foods) could theoretically increase leaching; brand offers no test data.
Glass breakage and sharp edges
Borosilicate glass is durable but not shatterproof. User reviews on retail platforms document occasional lid cracking and edge chipping; this is a physical safety concern, not chemical, but relevant to product integrity over time.
Plastic lid degradation and off-gassing
Repeated microwave and dishwasher cycles can degrade plastic lids, potentially releasing volatile organic compounds or unidentified additives. The brand does not disclose lid composition or degradation timeline, limiting ability to assess long-term chemical safety.
Lead or cadmium in glass
Borosilicate glass used for food storage is not typically a source of lead or cadmium contamination. No recalls or testing issues are documented for PrepNaturals containers; standard food-grade borosilicate carries minimal risk.
Microplastic shedding from lids
If plastic lids are heated or become worn, microscopic plastic particles may shed into stored food. The brand does not specify lid durability standards or material composition, making long-term microplastic risk difficult to quantify.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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
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Lower-concern option; glass containers avoid PFAS coatings, but verify lid material before purchase.
⚠Risky category by default
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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.