Simple Modern · Insulated Travel Drinkware
Simple Modern Trek Tumbler
Lower concern. Stainless steel body minimizes PFAS risk.
Simple Modern Trek Tumblers use stainless steel construction, a material without known PFAS concerns. The brand makes no specific PFAS claims, and plastic components present minor residual risk.
Shop Simple Modern on Amazon →Material
Double-wall stainless steel with plastic lid/baseband
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 Trek Tumbler uses double-wall stainless steel (grade unspecified but typically 18/8 or 304) for the beverage chamber, which is chemically inert and does not leach metals into cold or hot liquids. The lid and base band are plastic, likely polypropylene or similar thermoplastic; these contact the mouth and rim but not the beverage itself. Stainless steel is one of the safest food-contact materials available and is not a source of BPA, phthalates, or other common polymer contaminants.
The brand's record and disclosure
Simple Modern does not publicly disclose ingredient or material certifications (FDA approval, third-party testing, PFAS commitment statements). No safety recalls or substantiated product hazard reports are on record for this model. The brand has not taken a public stance on PFAS or other synthetic chemical avoidance, which suggests either a neutral risk profile or passive compliance with baseline regulations rather than proactive material screening.
How it compares in its category
Stainless steel tumblers are among the safest reusable drink containers on the market and outperform plastic-only or plastic-lined alternatives in leaching risk. The Trek Tumbler is competitive with other mid-range steel bottles (Hydro Flask, S'well, Klean Kanteen) in material safety; most competing products also use plastic lids, so lid composition is roughly equivalent across the category. Price positioning suggests standard manufacturing, not premium sourcing, so material traceability is typical rather than exceptional.
If you buy it
Wash the plastic lid by hand before first use and periodically (dishwasher safe according to brand, but hand washing extends plastic life). Do not microwave or apply extreme heat to the plastic components; the lid's usable temperature range is typically 40-80 degrees Celsius. Replace the lid if it becomes visibly cloudy, cracked, or develops odor, as plastic degrades over time with repeated thermal cycling. Avoid prolonged contact with acidic beverages at high temperatures, as any microscopic seams between stainless and plastic could theoretically trap corrosive liquids.
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.”
Plastic lid leachables (BPA/BPS or phthalates)
Simple Modern has not disclosed the specific plastic resin or additives in the lid. Polypropylene (PP) and similar thermoplastics used in food-contact lids are typically BPA-free, but phthalate and other plasticizer use is not ruled out without lab testing or certification. The lid does not contact the beverage directly, only the mouth/lips and the rim.
Stainless steel quality and corrosion
No evidence of nickel leaching, corrosion, or material degradation in this model. High-quality stainless steel (18/8) is resistant to acidic beverages and normal wear. Without specification of the exact steel grade from Simple Modern, a minor risk remains that lower-grade stainless (with higher nickel or impurities) could theoretically corrode under extreme conditions, but this is not documented f
Plastic base band degradation and mouth contact
The plastic base band or rim that contacts the lips/mouth may degrade with repeated thermal cycling and mechanical stress. Degraded plastic can fragment into microplastics or off-gas volatile organics, though risk is low if the product is not microwaved or exposed to boiling water repeatedly. Inspection every 6-12 months is recommended.
Manufacturing process off-gassing or residues
No recalls or reports of chemical odor, residue, or VOC off-gassing from new Trek Tumblers. Stainless steel manufacturing does not typically introduce volatile contaminants. A brief hand wash before first use is a standard precaution but not specific to a known defect in this brand.
PFAS in plastic components
PFAS use in tumbler lids is not a known industry practice, and Simple Modern's plastic lid is unlikely to contain intentional PFAS. However, the brand does not certify PFAS-free manufacturing, so residual or incidental contamination cannot be ruled out without third-party testing.
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.
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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.