Contigo · Insulated Drinkware Tumblers
Contigo Streeterville Tumbler 40-oz
Lower concern; stainless steel tumbler with no known PFAS-typical features.
Contigo Streeterville is a stainless steel insulated tumbler with no waterproof coatings or nonstick surfaces. No PFAS disclosures found, but core material poses lower inherent risk.
Shop Contigo on Amazon →Material
Stainless steel exterior, plastic/elastomer lid and base
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Streeterville uses a 18/8 stainless steel exterior, which is chemically inert and does not leach metals into beverages under normal use. The lid and base are elastomer/plastic components typical of insulated tumblers. Stainless steel is one of the safest food-contact materials because its chromium-nickel alloy resists corrosion and does not release ions into acidic or hot liquids the way aluminum or uncoated steel would.
The brand's record and disclosure
Contigo publishes basic material composition but does not prominently disclose detailed chemical testing or third-party certifications (BPA-free claims are present on some product lines but not universally verified). The brand has no major documented product recalls or safety controversies related to leaching or coating degradation. No public PFAS stance or transparency statement has been identified, which is typical for mid-market drinkware brands.
How it compares in its category
Insulated stainless steel tumblers are among the lowest-risk reusable drink containers because the metal barrier eliminates most plastic-food contact. The Streeterville's sealed lid design is common and performs similarly to competitors like Hydro Flask or Yeti. The main variable is lid/gasket durability and whether replacement parts are available; Contigo has reasonable parts support compared to some brands.
If you buy it
Hand-wash the lid regularly to prevent mold growth in seals, especially if used for milk or sugar-containing drinks. Avoid prolonged contact with highly acidic beverages (citrus juice, vinegar) for extended periods, though stainless steel is resistant. Replace gaskets or lids if they become visibly degraded, cracked, or no longer seal; check Contigo's website for part availability. Do not use in dishwasher if manufacturer specifies hand-wash, as repeated high heat can degrade elastomer components.
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.”
Lid/base elastomer degradation
Silicone or rubber gaskets and seals can degrade with age, heat cycling, or chlorine exposure, potentially releasing microparticles or losing antimicrobial properties. Contigo products show normal wear patterns but replacement parts are available.
Bacterial growth in seals
Stainless steel tumbler seals are difficult to clean completely; warm, moist environments promote mold and bacteria if lids are not dried thoroughly after washing. This is a hygiene issue rather than a chemical leaching risk.
BPA in plastic lid components
Contigo does label many products BPA-free, and third-party testing has not reported BPA in recent Streeterville models. No established safety alert exists for this product line.
Heavy metals in stainless steel
18/8 stainless steel is regulated for food contact and does not leach chromium or nickel under normal drinking-use conditions. No recalls or testing concerns are on record for Contigo's stainless products.
Phthalates or plasticizers in elastomer
Modern food-contact elastomers in insulated tumblers are typically phthalate-free, though Contigo does not publish detailed plasticizer disclosure. No documented contamination has been reported in this product category.
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 Insulated Drinkware Tumblers
Contigo
Byron 2.0 Stainless Steel Travel Mug Snapseal
Stainless steel, silicone gasket
Travel mug with lower PFAS concern; stainless steel typically safe.
✓Bare metal or glass, no coating at all
Thermos
Stainless King Travel Tumbler
Stainless steel exterior, vacuum-insulated, minimal internal coating
Lower concern. Stainless steel tumbler with standard design, no PFAS-prone features.
✓Bare metal or glass, no coating at all
Thermos
Stainless Steel Tumbler w/ Slide Lock Lid
Stainless steel tumbler with plastic slide lock lid
Lower concern. Stainless steel is PFAS-free; monitor lid material.
✓Bare metal or glass, no coating at all
More insulated drinkware tumblers 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.