Simple Modern · Insulated Travel Drinkware
Simple Modern Harry Potter 40 oz Tumbler
Lower concern. Stainless steel tumbler unlikely to contain PFAS.
Simple Modern's 40 oz tumbler is primarily stainless steel construction, an inherently PFAS-free material. No waterproof coatings or nonstick surfaces typical of PFAS concern in drinkware.
Shop Simple Modern on Amazon →Material
Stainless steel double-wall insulated tumbler
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
This tumbler is double-wall stainless steel (18/8 or similar food-grade alloy) with a plastic lid and interior coating. Stainless steel does not leach metals into beverages under normal use because the chromium oxide layer passivates the surface. The plastic lid (likely polypropylene or acrylic) carries minimal risk if kept away from boiling liquids, as it sits above the drink line in most designs. The interior coating, if present, is typically a food-safe epoxy or polymer that protects against corrosion but should be checked for damage.
The brand's record and disclosure
Simple Modern is a subsidiary of Hydro Flask's parent company and has built reputation on durable, BPA-free drinkware marketed to families and licensed franchises (Disney, Marvel, etc.). The brand does not publish comprehensive material safety data sheets or third-party certifications for heavy metals or coating composition. No recalls or safety complaints appear in public FDA or CPSC records for this product line. Silence on PFAS coating use is typical for the budget drinkware category, though not a red flag given the material choice.
How it compares in its category
Stainless steel tumblers are among the safest drinkware options, ranking above ceramic (potential glaze contaminants), aluminum (oxidation concerns), and plastic bottles (BPA/BPS exposure). Simple Modern positions itself mid-market between cheap plastic alternatives and premium brands like Hydro Flask or S'well, with comparable safety profiles. Licensed character products typically undergo toy/food-contact safety audits, though these are not always disclosed. The 40 oz size is standard and carries no size-specific risk.
If you buy it
Hand-wash rather than dishwash to preserve any interior epoxy coating; check the lid monthly for cracks or discoloration. Do not fill with boiling liquid immediately, as thermal shock can degrade the plastic lid seal over years of use. Replace the lid if you notice warping, cloudiness, or odor, as it wears faster than the steel body. Stainless steel bodies are effectively permanent; corrosion risk is negligible unless the exterior coating is deeply scratched and exposed to salt water repeatedly.
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 degradation (BPA/BPS exposure)
No published composition of Simple Modern lids; assuming polypropylene (PP) or acrylic, which do not typically contain BPA. However, lid material is not disclosed, so low-level phthalate or BPS use cannot be ruled out. Inspect for wear and replace if discolored.
Interior epoxy coating integrity
Stainless steel tumblers often include epoxy or polyester powder coat for aesthetics. If coating is damaged by aggressive cleaning, corrosion is minimal but coating particles could theoretically shed into liquid. No recalls reported for this product; risk is low if cup is not scratched internally.
Lead or cadmium in decorative print or glaze
Licensed character artwork on this tumbler is typically screen-printed or laser-etched onto the stainless surface, not glazed. Licensed toys and drinkware sold in US are subject to CPSC lead limits for children's products. No specific test data published for this product, but brand reputation and lack of recalls suggest compliance.
Microplastics from lid wear
Polypropylene lids can degrade and shed small particles over extended use, especially with hot beverages or aggressive cleaning. Risk is present but minor; replace lid every 1-2 years if heavily used to minimize exposure.
Thermal stress cracking of plastic components
Repeated filling with very hot liquids or rapid temperature changes can cause the plastic lid and seal gasket to fail prematurely, potentially releasing plasticizers. Use room-temperature water for initial fill if adding boiling liquid to minimize thermal shock.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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 Travel Drinkware
Ember
Cold Tumbler
stainless steel with silicone seal
Lower concern; stainless steel tumbler unlikely to contain PFAS.
✓Naturally PFAS-free material
Ember
Tumblers - Set of 4
Stainless steel double-wall insulated
Lower PFAS concern; stainless steel drinkware rarely treated.
✓Naturally PFAS-free material
Ember
Cup 14 oz Slate Black
Ceramic or ceramic-coated stainless steel with heated base
Lower concern. Smart cup uses ceramic coating, not Teflon-type coating nonstick.
✓Naturally PFAS-free material
More insulated travel drinkware 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.