Do Prepara lunch boxes have PFAS?
Prepara lunch boxes average 75 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 Prepara lunch boxes graded as of October 2026, above the 70 out of 100 median for the 42 other lunch boxes brands graded alongside it.
Prepara lunch boxes average Excellent on our four-band scale. 4 of the 4 we graded are worth buying. That is above 86% of the lunch boxes brands we grade.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
Prepara lunch boxes worth buying Good or better, best-graded first
- stainless steel with silicone gasket seals
- We found no PFAS statement from the brand
- Silicone gasket degradation over time. Silicone seals are durable but not permanent; repeated thermal stress…
2 hazards checked on this product, all on its full breakdown.
- stainless steel, plastic latch and silicone gasket
- We found no PFAS statement from the brand
- Silicone gasket degradation. Silicone gaskets can absorb odors, stain, and harden over many years of repeated…
2 hazards checked on this product, all on its full breakdown.
- Plastic (likely polypropylene or copolyester); locking mechanism is metal or plastic.
- We found no PFAS statement from the brand
- Microplastics. Polypropylene base carries minimal risk at room temperature, but heating above 140°F can…
2 hazards checked on this product, all on its full breakdown.
- plastic (BPA-free claimed by brand; composition unspecified)
- We found no PFAS statement from the brand
- BPA & bisphenols. Brand claims BPA-free but does not name the replacement compound. Cold-storage leaching…
5 hazards checked on this product, all on its full breakdown.
Better lunch boxes from other brands
Graded higher than the Prepara average of 75.
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, all on its full breakdown.
- borosilicate glass
- We found no PFAS statement from the brand
- Leaching from glass matrix or lid seals
2 hazards checked on this product, all on its full breakdown.
- Stainless steel container, no surface treatment
- Lid/gasket polymer leaching
3 hazards checked on this product, all on its full breakdown.
The same question, asked of the other lunch boxes brands
Best average grade first. Prepara averages 75.
See every Prepara product we grade on the Prepara brand page, or the full lunch boxes ranking.