Duralex Glassware & Drinkware, Is It Non-Toxic?
Lower concern. Uncoated borosilicate glass has no PFAS risk.
Duralex makes tempered borosilicate glassware with no applied coatings or treatments. Glass is an inherently lower-concern material for PFAS exposure.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Borosilicate glass, no coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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Is Duralex Glassware & Drinkware non-toxic? What it is made of
Duralex glassware is manufactured from borosilicate glass, a silica-based material with added boron oxide that increases thermal and mechanical durability. Borosilicate has no surface coating and does not leach lead, cadmium, aluminum, or other heavy metals into food or beverages under normal use. The material is inert, non-porous, and chemically resistant to acidic and alkaline foods, making it one of the lowest-concern cookware materials for direct food contact.
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.
Thermal shock and breakage
Borosilicate glass is prone to cracking or shattering if moved directly from extreme heat to cold or vice versa. This is a physical safety concern (cuts, burns) rather than a chemical hazard, and is inherent to the material class.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Lead
Duralex borosilicate glassware has no coating, glaze, or enamel. No surface treatment is applied, so no heavy metals are present in decorative or functional coatings. This hazard does not apply to this product.
Source, ATSDR ↗Coating degradation and leaching
Uncoated borosilicate glass has no surface coating to degrade, flake, or leach into food. The material itself is non-reactive and inert. No documented cases of coating failure in Duralex borosilicate products.
Aluminum leaching
Duralex glassware is glass, not aluminum. No aluminum-based materials are used in the product body or any components that contact food.
Teflon-type coating fume risk
Borosilicate glass contains no Teflon-family coating or nonstick coatings. No Teflon-type coating or Teflon-type coating-related compounds are present. This hazard does not apply to uncoated glass cookware.
How is this PFAS grade calculated?
The brand's record and disclosure
Duralex has a long manufacturing history (founded 1926, France) with established reputation for borosilicate-glass kitchenware. The brand does not publicly disclose extensive safety testing data or third-party certifications on its website. No significant product recalls, lead contamination incidents, or material-sourcing controversies are documented in public records. The brand's silence on PFAS is consistent with borosilicate glass, which has no PFAS-related risk.
How it compares in its category
Borosilicate glass drinkware and cookware rank among the lowest-concern options. Unlike ceramic-coated or enameled cookware, there is no glaze, enamel, or surface treatment to degrade or leach. Unlike nonstick cookware, there is no Teflon-type coating or polymer coating and no fume risk. Unlike aluminum or stainless-steel vessels, there is minimal reactivity with acidic foods and no reported leaching concerns.
If you buy it
Borosilicate glass can withstand high heat (typically safe to 500F / 260C for cookware) but thermal shock from rapid temperature changes can cause breakage; allow gradual heating and cooling. Inspect glassware before purchase for chips or cracks, which may propagate under use. Glass is durable and does not require replacement due to coating wear since there is no coating. Hand wash or use standard dishwasher cycles; borosilicate does not degrade from detergent or hot water.
What is not known about PFAS in this product?
- Basis
- Model estimate, 92% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Duralex has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Duralex Glassware & Drinkware?
- Stainless steel clad construction, no nonstick coating
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- Clad separation or delamination over time
- stainless steel clad construction, no nonstick coating
- The brand calls it PFAS-free, which we have not verified
- Nickel leaching from stainless steel
3 hazards checked on this product, all on its full breakdown.
- Clad stainless steel, no coating
- The brand calls it PFAS-free, which we have not verified
- Metal ion release during cooking (iron, nickel, chromium)
More cookware 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.