Simple Modern · Insulated Drink Tumblers
Simple Modern Harry Potter 40 oz Tumbler
Lower concern. Stainless steel tumbler with no coating on record.
This tumbler is stainless steel with no water-repellent finish or nonstick coating on record. Stainless steel is not a material linked to PFAS. The brand has no PFAS statement on record.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel double-wall insulated tumbler
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Simple Modern Harry Potter 40 oz Tumbler is made of, ingredients and materials
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.
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.
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.
Microplastics
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.
Source, EPA ↗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’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
BPA & bisphenols
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.
Source, FDA ↗Lead
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.
Source, ATSDR ↗The full breakdown
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 show lower concern compared to 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.
What we don’t know
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Simple Modern has made none
Formulations change between production runs, so check the current label. How we grade.
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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.