Prep Naturals · Food Storage Containers
Prep Naturals 10 Pack 25 ounce Clear Food Storage Containers with Lids
Lower PFAS concern for basic food storage; no red flags but brand makes no PFAS claims.
Prep Naturals clear food storage containers are made from polypropylene plastic, a material not typically treated with PFAS coatings since it has no nonstick, water-repellent, or stain-resistant claims. The brand does not disclose PFAS status one way or the other.
Shop Prep Naturals on Amazon →Material
Polypropylene (PP) plastic containers
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
These containers are polypropylene (PP, plastic #5), a thermoplastic polymer chosen for food storage because it resists chemical leaching at room temperature and below. PP does not contain BPA or phthalates by default. The material becomes a concern only when heated above ~160-170°F or exposed to prolonged sunlight, conditions that can degrade the polymer and theoretically release oligomers (incomplete polymers). For cold storage and moderate dishwasher cycles, PP is considered one of the safer rigid food-contact plastics.
The brand's record and disclosure
Prep Naturals has no published safety certifications, third-party testing transparency, or formal PFAS stance on file. The brand does not explicitly market these containers as PFAS-free or BPA-free. No product recalls, safety violations, or manufacturing controversies have been publicly documented. The silence on chemical disclosure is typical for mid-range food storage brands and does not itself indicate a problem, but it means you are relying on the inherent safety profile of polypropylene rather than brand assurance.
How it compares in its category
Polypropylene food storage containers are mainstream and considered safer than older polycarbonate (PC #7) alternatives that may contain BPA. Prep Naturals sits in the standard price/function tier: inexpensive, durable lids, and microwave-safe (within limits). Premium competitors (e.g., Rubbermaid Brilliance, Sistema) offer similar material but with more explicit safety labeling and sometimes glass hybrid options. The 10-pack format is typical for value-driven brands; quality and lid seal durability vary but are rarely a safety issue.
If you buy it
Use these containers for cold and room-temperature food storage; avoid prolonged microwave heating (especially fatty or acidic foods) as this accelerates polymer degradation. Hand-wash or place on the top rack of the dishwasher to minimize heat exposure and prolong lid elasticity. Replace containers if you notice cloudiness, cracks, or persistent odors, which signal polymer breakdown. Do not leave them in direct sunlight for extended periods, as UV light degrades polypropylene over months to years.
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/phthalate leaching
Polypropylene (#5) does not contain BPA or phthalates by formulation. No records of Prep Naturals containers being found to contain these chemicals in independent testing.
Microplastics and polymer degradation (heat exposure)
Repeated or prolonged microwave heating, hot dishwasher cycles, or exposure to hot foods can degrade PP over time and release small polymer fragments. Risk is low for normal cold storage use but increases with heavy microwave or boiling-water contact.
Lid seal degradation and bacterial growth
PP lids are prone to wear and loss of seal integrity over years of use. Poor seals allow air exchange and can foster bacterial growth in stored food, though this is a functional failure rather than a chemical hazard. Regular inspection is recommended.
Odor absorption and off-flavor transfer
Polypropylene is mildly lipophilic and can absorb strong odors (garlic, curry, etc.) and fats over time. This is a flavor/quality issue, not a safety hazard, but indicates the material's porous nature at the molecular level.
Heavy metals or pigment contaminants
Clear polypropylene containers typically contain no added pigments or colorants that could harbor heavy metals. No recalls or test reports of lead, cadmium, or antimony in Prep Naturals products.
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.