Contigo · Insulated Drink Tumblers
Contigo Streeterville Tumbler 40-oz
Lower concern, as stainless steel tumbler has no known PFAS-typical features.
Contigo Streeterville is a stainless steel insulated tumbler with no waterproof coatings or nonstick surfaces. No PFAS disclosures were found, but the core material poses lower inherent risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel exterior, plastic/elastomer lid and base
Lab data
No public lab test
What Contigo Streeterville Tumbler 40-oz is made of, ingredients and materials
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 has lower concern as a food-contact material because its chromium-nickel alloy resists corrosion and does not release ions into acidic or hot liquids the way aluminum or uncoated steel would.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
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.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
BPA & bisphenols
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.
Source, FDA ↗Heavy metals
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.
Source, FDA ↗Phthalates
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.
Source, ATSDR ↗The full breakdown
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.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Contigo has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Insulated Drink Tumblers
Klean Kanteen
20oz TKWide with Café Cap, Tofu
- Stainless steel bottle, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Powder-coat cap degradation over time
3 hazards checked on this product. See all of them.
Klean Kanteen
16oz Rise Tumbler
- Stainless steel body, powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation
3 hazards checked on this product. See all of them.
Klean Kanteen
Insulated TKWide Cap
- Stainless steel bottle, plastic cap and silicone gasket
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation and leaching
3 hazards checked on this product. See all of them.
More insulated drink 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.