Contigo Review, Is Contigo Non-Toxic?
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.
Across 7 graded products, Contigo averages Good (54/100). On disclosure, the brand says nothing publicly about PFAS. 2 of its products grade Good or better. Grades are model-based estimates, not lab results.
Worth buying from Contigo Good or better, safest first
Contigo
Autoseal West Loop Stainless Steel Travel Mug
stainless steel body, silicone gasket/lid seal
Silicone gasket degradation and bacterial/mold colonization
Silicone seals in insulated mugs can accumulate moisture and bacteria if not dried…
Low-Medium risk. Stainless steel and silicone have minimal PFAS risk.
⚠Risky category by default
Contigo
Cortland Chill 2.0 Stainless Steel Water Bottle
stainless steel, no reported coating
Gasket and seal degradation
Rubber or silicone gaskets in the lid can degrade over time, especially with hot…
Bacterial growth in inaccessible spaces
The double-wall vacuum design creates sealed air space that cannot be directly cleaned.…
Thermal stress and seal failure
Repeated exposure to extreme temperature differences can compromise the vacuum seal or…
Low-Medium risk. Bare stainless steel bottle with no known problematic coatings.
⚠Risky category by default
Graded and flagged Poor and Bad, we’d swap these
Contigo
Byron 2.0 Insulated Travel Mug
Stainless steel exterior, BPA-free plastic lid and interior
Phthalates
Flexible sealing gaskets in the lid may contain phthalate plasticizers to maintain…
Stainless steel nickel leaching
Food-grade stainless steel (18/8) contains chromium and nickel; trace nickel can migrate…
Microplastics
Repeated exposure to hot beverages or boiling water can degrade the plastic lid and…
Low-Medium risk. Stainless steel body is unlikely to hold PFAS.
⚠Risky category by default
Contigo
West Loop 3.0 Stainless Steel Travel Mug with AUTOSEAL Lid
stainless steel, polymer lid
PFAS
The AUTOSEAL lid's exact polymer type and whether it contains PFAS-based coatings is not…
Silicone gasket degradation and leaching
Silicone gaskets in sealed lids can degrade over time with heat exposure and repeated…
Acetal or polypropylene lid aging and heat degradation
If the lid is acetal copolymer (common in high-temperature-resistant lids), it can…
Bacterial or mold growth in sealed mechanism
The AUTOSEAL closure creates a moist, enclosed environment that can harbor bacteria or…
Low-Medium risk. Stainless steel body poses lower concern; lid polymer unspecified.
⚠Risky category by default
Contigo
West Loop 2.0 Travel Mug 2-Pack
Stainless steel exterior, plastic interior lid/valve
Plastic lid and valve wear/leaching
The polypropylene or acetal plastic components in the lid and valve assembly may release…
Bacterial or mold growth in valve mechanism
Multi-part flip or auto-seal valves in travel mugs are known to accumulate biofilm and…
Low-Medium risk. Stainless travel mug with no PFAS disclosure required.
⚠Risky category by default
Contigo
West Loop 2.0 Leak-Proof Spill-Proof Insulated Travel Mug
Stainless steel with unspecified waterproof/leak-proof coating
PFAS
The unspecified waterproof/leak-proof coating on lid seals and gaskets is the primary…
Silicone gasket degradation and leaching
If gaskets are silicone-based, prolonged contact with hot liquids or acidic beverages…
Mold and bacterial growth in insulation cavity
Double-wall insulated mugs can trap moisture and organic matter in the sealed cavity…
Coating wear and microparticle shedding
If the lid coating or gasket surface wears over time (especially with dishwasher use or…
High risk. Skip until Contigo discloses leak-proof coating composition.
⚠Waterproof or stain-proof treatment
Contigo
Superior 2.0 Travel Mug
stainless steel with unspecified interior coating
PFAS
Stainless steel tumblers commonly use Teflon-type coating or similar Teflon-family…
Coating degradation and microplastic/particulate release
If the interior coating is polymer-based and becomes scratched or worn, small particles…
Off-gassing from coating under heat stress
If the mug is used with boiling water or left in direct sunlight for extended periods, an…
High risk. Skip until Contigo discloses interior coating composition.
⚠Nonstick, coating undisclosed
Every grade uses the same public rubric. How grades work →